30th United States Congress

The 30th United States Congress was a meeting of the legislative branch of the United States federal government, consisting of the United States Senate and the United States House of Representatives. It met in Washington, D.C. from March 4, 1847, to March 4, 1849, during the last two years of the administration of President James K. Polk. The apportionment of seats in the House of Representatives was based on the 1840 United States census. The Senate had a Democratic majority, and the House had a Whig majority. It was the only Congress in which Abraham Lincoln served.

Major events



 * July 1, 1847: United States issued its first postage stamps
 * January 24, 1848: Gold found at Sutter's Mill, beginning the California Gold Rush
 * January 31, 1848: Washington Monument established
 * May 29, 1848: Wisconsin is granted statehood, becoming the 30th state
 * February 23, 1848: Former President John Quincy Adams, now a Congressman representing Massachusetts, dies in the Speaker's office after suffering a stroke in the House Chambers.
 * July 19, 1848: Seneca Falls Convention
 * November 7, 1848: U.S. presidential election, 1848: Whig Zachary Taylor defeated Lewis Cass in the first US presidential election held in every state on the same day.
 * 1846–1848: Mexican–American War

Major legislation

 * March 3, 1849: United States Department of the Interior established, sess. 2, ch. 108,
 * March 3, 1849: Gold Coinage Act, sess. 2, ch. 109,

Treaty

 * February 2, 1848: Treaty of Guadalupe Hidalgo signed, ending the Mexican–American War and ceding to the United States virtually all of what is today the southwest United States.

States admitted and territories established

 * May 29, 1848: Wisconsin admitted as the 30th U.S. state, sess. 1, ch. 50,
 * August 14, 1848: Oregon Territory was formed from territory ceded by Great Britain, sess. 1, ch. 177,
 * March 3, 1849: Minnesota Territory formed from the Wisconsin Territory, sess. 2, ch. 121,

Senate
During this congress, two Senate seats were added for the new state of Wisconsin.

House of Representatives
During this congress, two House seats were added for the new state of Wisconsin.

Senate

 * President: George M. Dallas (D)
 * President pro tempore: David R. Atchison (D)

House of Representatives

 * Speaker: Robert C. Winthrop (W)

Members
This list is arranged by chamber, then by state. Senators are listed by class and representatives are listed by district.
 * Skip to House of Representatives, below

Alabama

 * 2. Dixon H. Lewis (D), until October 25, 1848
 * Benjamin Fitzpatrick (D), from November 25, 1848
 * 3. Arthur P. Bagby (D), until June 16, 1848
 * William R. King (D), from July 1, 1848

Arkansas

 * 2. Chester Ashley (D), until April 29, 1848
 * William K. Sebastian (D), from May 12, 1848
 * 3. Ambrose H. Sevier (D), until March 15, 1848
 * Solon Borland (D), from March 30, 1848

Connecticut

 * 1. Jabez W. Huntington (W), until November 1, 1847
 * Roger S. Baldwin (W), from November 11, 1847
 * 3. John M. Niles (D)

Delaware

 * 1. John M. Clayton (W), until February 23, 1849
 * John Wales (W), from February 23, 1849
 * 2. Presley Spruance (W)

Florida

 * 1. David Levy Yulee (D)
 * 3. James Westcott (D)

Georgia

 * 2. John Macpherson Berrien (W)
 * 3. Walter T. Colquitt (D), until February 4, 1848
 * Herschel V. Johnson (D), from February 4, 1848

Illinois

 * 2. Stephen A. Douglas (D)
 * 3. Sidney Breese (D)

Indiana

 * 1. Jesse D. Bright (D)
 * 3. Edward A. Hannegan (D)

Iowa

 * 2. George Wallace Jones (D), from December 7, 1848
 * 3. Augustus C. Dodge (D), from December 7, 1848

Kentucky

 * 2. Joseph R. Underwood (W)
 * 3. John J. Crittenden (W), until June 12, 1848
 * Thomas Metcalfe (W), from June 23, 1848

Louisiana

 * 2. Solomon W. Downs (D)
 * 3. Henry Johnson (W)

Maine

 * 1. John Fairfield (D), until December 24, 1847
 * Wyman B. S. Moor (D), January 5, 1848 – June 7, 1848
 * Hannibal Hamlin (D), from June 7, 1848
 * 2. James W. Bradbury (D)

Maryland

 * 1. Reverdy Johnson (W)
 * 3. James Pearce (W)

Massachusetts

 * 1. Daniel Webster (W)
 * 2. John Davis (W)

Michigan

 * 1. Lewis Cass (D), until May 29, 1848
 * Thomas Fitzgerald (D), from June 8, 1848
 * 2. Alpheus Felch (D)

Mississippi

 * 1. Jesse Speight (D), until May 1, 1847
 * Jefferson Davis (D), from August 10, 1847
 * 2. Henry S. Foote (D)

Missouri

 * 1. Thomas H. Benton (D)
 * 3. David R. Atchison (D)

New Hampshire

 * 2. John P. Hale (ID)
 * 3. Charles G. Atherton (D)

New Jersey

 * 1. William L. Dayton (W)
 * 2. Jacob W. Miller (W)

New York

 * 1. Daniel S. Dickinson (D)
 * 3. John A. Dix (D)

North Carolina

 * 2. Willie P. Mangum (W)
 * 3. George E. Badger (W)

Ohio

 * 1. Thomas Corwin (W)
 * 3. William Allen (D)

Pennsylvania

 * 1. Daniel Sturgeon (D)
 * 3. Simon Cameron (D)

Rhode Island

 * 1. Albert C. Greene (W)
 * 2. John H. Clarke (W)

South Carolina

 * 2. John C. Calhoun (D)
 * 3. Andrew Butler (D)

Tennessee

 * 1. Hopkins L. Turney (D)
 * 2. John Bell (W), from November 22, 1847

Texas

 * 1. Thomas J. Rusk (D)
 * 2. Samuel Houston (D)

Vermont

 * 1. Samuel S. Phelps (W)
 * 3. William Upham (W)

Virginia

 * 1. James M. Mason (D)
 * 2. Robert M. T. Hunter (D)

Wisconsin

 * 1. Henry Dodge (D), from June 8, 1848 (newly admitted state)
 * 3. Isaac P. Walker (D), from June 8, 1848 (newly admitted state)





House of Representatives
The names of members of the House of Representatives are preceded by their district numbers.

Alabama

 * Alabama's 1st congressional district. John Gayle (W)
 * Alabama's 2nd congressional district. Henry W. Hilliard (W)
 * Alabama's 3rd congressional district. Sampson W. Harris (D)
 * Alabama's 4th congressional district. Samuel W. Inge (D)
 * Alabama's 5th congressional district. George S. Houston (D)
 * Alabama's 6th congressional district. Williamson R. W. Cobb (D)
 * Alabama's 7th congressional district. Franklin W. Bowdon (D)

Arkansas

 * Arkansas's at-large congressional district. Robert W. Johnson (D)

Connecticut

 * Connecticut's 1st congressional district. James Dixon (W)
 * Connecticut's 2nd congressional district. Samuel D. Hubbard (W)
 * Connecticut's 3rd congressional district. John A. Rockwell (W)
 * Connecticut's 4th congressional district. Truman Smith (W)

Delaware

 * Delaware's at-large congressional district. John W. Houston (W)

Florida

 * Florida's at-large congressional district. Edward C. Cabell (W)

Georgia

 * Georgia's 1st congressional district. Thomas Butler King (W)
 * Georgia's 2nd congressional district. Alfred Iverson Sr. (D)
 * Georgia's 3rd congressional district. John W. Jones (W)
 * Georgia's 4th congressional district. Hugh A. Haralson (D)
 * Georgia's 5th congressional district. John H. Lumpkin (D)
 * Georgia's 6th congressional district. Howell Cobb (D)
 * Georgia's 7th congressional district. Alexander H. Stephens (W)
 * Georgia's 8th congressional district. Robert A. Toombs (W)

Illinois

 * Illinois's 1st congressional district. Robert Smith (ID)
 * Illinois's 2nd congressional district. John A. McClernand (D)
 * Illinois's 3rd congressional district. Orlando B. Ficklin (D)
 * Illinois's 4th congressional district. John Wentworth (D)
 * Illinois's 5th congressional district. William A. Richardson (D), from December 6, 1847
 * Illinois's 6th congressional district. Thomas J. Turner (D)
 * Illinois's 7th congressional district. Abraham Lincoln (W)

Indiana

 * Indiana's 1st congressional district. Elisha Embree (W)
 * Indiana's 2nd congressional district. Thomas J. Henley (D)
 * Indiana's 3rd congressional district. John L. Robinson (D)
 * Indiana's 4th congressional district. Caleb B. Smith (W)
 * Indiana's 5th congressional district. William W. Wick (D)
 * Indiana's 6th congressional district. George G. Dunn (W)
 * Indiana's 7th congressional district. Richard W. Thompson (W)
 * Indiana's 8th congressional district. John Pettit (D)
 * Indiana's 9th congressional district. Charles W. Cathcart (D)
 * Indiana's 10th congressional district. William R. Rockhill (D)

Iowa

 * Iowa's 1st congressional district. William Thompson (D)
 * Iowa's 2nd congressional district. Shepherd Leffler (D)

Kentucky

 * Kentucky's 1st congressional district. Linn Boyd (D)
 * Kentucky's 2nd congressional district. Beverly L. Clarke (D)
 * Kentucky's 3rd congressional district. Samuel O. Peyton (D)
 * Kentucky's 4th congressional district. Aylette Buckner (W)
 * Kentucky's 5th congressional district. John B. Thompson (W)
 * Kentucky's 6th congressional district. Green Adams (W)
 * Kentucky's 7th congressional district. W. Garnett Duncan (W)
 * Kentucky's 8th congressional district. Charles S. Morehead (W)
 * Kentucky's 9th congressional district. Richard French (D)
 * Kentucky's 10th congressional district. John P. Gaines (W)

Louisiana

 * Louisiana's 1st congressional district. Emile La Sére (D)
 * Louisiana's 2nd congressional district. Bannon G. Thibodeaux (W)
 * Louisiana's 3rd congressional district. John H. Harmanson (D)
 * Louisiana's 4th congressional district. Isaac E. Morse (D)

Maine

 * Maine's 1st congressional district. David Hammons (D)
 * Maine's 2nd congressional district. Asa W. H. Clapp (D)
 * Maine's 3rd congressional district. Hiram Belcher (W)
 * Maine's 4th congressional district. Franklin Clark (D)
 * Maine's 5th congressional district. Ephraim K. Smart (D)
 * Maine's 6th congressional district. James S. Wiley (D)
 * Maine's 7th congressional district. Hezekiah Williams (D)

Maryland

 * Maryland's 1st congressional district. John G. Chapman (W)
 * Maryland's 2nd congressional district. J. Dixon Roman (W)
 * Maryland's 3rd congressional district. Thomas W. Ligon (D)
 * Maryland's 4th congressional district. Robert M. McLane (D)
 * Maryland's 5th congressional district. Alexander Evans (W)
 * Maryland's 6th congressional district. John W. Crisfield (W)

Massachusetts

 * Massachusetts's 1st congressional district. Robert C. Winthrop (W)
 * Massachusetts's 2nd congressional district. Daniel P. King (W)
 * Massachusetts's 3rd congressional district. Amos Abbott (W)
 * Massachusetts's 4th congressional district. John G. Palfrey (W)
 * Massachusetts's 5th congressional district. Charles Hudson (W)
 * Massachusetts's 6th congressional district. George Ashmun (W)
 * Massachusetts's 7th congressional district. Julius Rockwell (W)
 * Massachusetts's 8th congressional district. John Quincy Adams (W), until February 23, 1848
 * Horace Mann (W), from April 3, 1848
 * Massachusetts's 9th congressional district. Artemas Hale (W)
 * Massachusetts's 10th congressional district. Joseph Grinnell (W)

Michigan

 * Michigan's 1st congressional district. Robert McClelland (D)
 * Michigan's 2nd congressional district. Edward Bradley (D), until August 5, 1847
 * Charles E. Stuart (D), from December 6, 1847
 * Michigan's 3rd congressional district. Kinsley S. Bingham (D)

Mississippi

 * Mississippi's 1st congressional district. Jacob Thompson (D)
 * Mississippi's 2nd congressional district. Winfield S. Featherston (D)
 * Mississippi's 3rd congressional district. Patrick W. Tompkins (W)
 * Mississippi's 4th congressional district. Albert G. Brown (D)

Missouri

 * Missouri's 1st congressional district. James B. Bowlin (D)
 * Missouri's 2nd congressional district. John Jameson (D)
 * Missouri's 3rd congressional district. James S. Green (D)
 * Missouri's 4th congressional district. Willard P. Hall (D)
 * Missouri's 5th congressional district. John S. Phelps (D)

New Hampshire

 * New Hampshire's 1st congressional district. Amos Tuck (I)
 * New Hampshire's 2nd congressional district. Charles H. Peaslee (D)
 * New Hampshire's 3rd congressional district. James Wilson (W)
 * New Hampshire's 4th congressional district. James H. Johnson (D)

New Jersey

 * New Jersey's 1st congressional district. James G. Hampton (W)
 * New Jersey's 2nd congressional district. William A. Newell (W)
 * New Jersey's 3rd congressional district. Joseph E. Edsall (D)
 * New Jersey's 4th congressional district. John Van Dyke (W)
 * New Jersey's 5th congressional district. Dudley S. Gregory (W)

New York

 * New York's 1st congressional district. Frederick W. Lord (D)
 * New York's 2nd congressional district. Henry C. Murphy (D)
 * New York's 3rd congressional district. Henry Nicoll (D)
 * New York's 4th congressional district. William B. Maclay (D)
 * New York's 5th congressional district. Frederick A. Tallmadge (W)
 * New York's 6th congressional district. David S. Jackson (D), until April 19, 1848
 * Horace Greeley (W), from December 4, 1848
 * New York's 7th congressional district. William Nelson (W)
 * New York's 8th congressional district. Cornelius Warren (W)
 * New York's 9th congressional district. Daniel B. St. John (W)
 * New York's 10th congressional district. Eliakim Sherrill (W)
 * New York's 11th congressional district. Peter H. Silvester (W)
 * New York's 12th congressional district. Gideon Reynolds (W)
 * New York's 13th congressional district. John I. Slingerland (W)
 * New York's 14th congressional district. Orlando Kellogg (W)
 * New York's 15th congressional district. Sidney Lawrence (D)
 * New York's 16th congressional district. Hugh White (W)
 * New York's 17th congressional district. George Petrie (ID)
 * New York's 18th congressional district. William Collins (D)
 * New York's 19th congressional district. Joseph Mullin (W)
 * New York's 20th congressional district. Timothy Jenkins (D)
 * New York's 21st congressional district. George A. Starkweather (D)
 * New York's 22nd congressional district. Ausburn Birdsall (D)
 * New York's 23rd congressional district. William Duer (W)
 * New York's 24th congressional district. Daniel Gott (W)
 * New York's 25th congressional district. Harmon S. Conger (W)
 * New York's 26th congressional district. William T. Lawrence (W)
 * New York's 27th congressional district. John M. Holley (W), until March 8, 1848
 * Esbon Blackmar (W), from December 4, 1848
 * New York's 28th congressional district. Elias B. Holmes (W)
 * New York's 29th congressional district. Robert L. Rose (W)
 * New York's 30th congressional district. David Rumsey Jr. (W)
 * New York's 31st congressional district. Dudley Marvin (W)
 * New York's 32nd congressional district. Nathan K. Hall (W)
 * New York's 33rd congressional district. Harvey Putnam (W)
 * New York's 34th congressional district. Washington Hunt (W)

North Carolina

 * North Carolina's 1st congressional district. Thomas L. Clingman (W)
 * North Carolina's 2nd congressional district. Nathaniel Boyden (W)
 * North Carolina's 3rd congressional district. Daniel M. Barringer (W)
 * North Carolina's 4th congressional district. Augustine H. Shepperd (W)
 * North Carolina's 5th congressional district. Abraham W. Venable (D)
 * North Carolina's 6th congressional district. John R. J. Daniel (D)
 * North Carolina's 7th congressional district. James I. McKay (D)
 * North Carolina's 8th congressional district. Richard S. Donnell (W)
 * North Carolina's 9th congressional district. David Outlaw (W)

Ohio

 * Ohio's 1st congressional district. James J. Faran (D)
 * Ohio's 2nd congressional district. David Fisher (W)
 * Ohio's 3rd congressional district. Robert C. Schenck (W)
 * Ohio's 4th congressional district. Richard S. Canby (W)
 * Ohio's 5th congressional district. William Sawyer (D)
 * Ohio's 6th congressional district. Rodolphus Dickinson (D)
 * Ohio's 7th congressional district. Jonathan D. Morris (D)
 * Ohio's 8th congressional district. John L. Taylor (W)
 * Ohio's 9th congressional district. Thomas O. Edwards (W)
 * Ohio's 10th congressional district. Daniel Duncan (W)
 * Ohio's 11th congressional district. John K. Miller (D)
 * Ohio's 12th congressional district. Samuel F. Vinton (W)
 * Ohio's 13th congressional district. Thomas Ritchey (D)
 * Ohio's 14th congressional district. Nathan Evans (W)
 * Ohio's 15th congressional district. William Kennon Jr. (D)
 * Ohio's 16th congressional district. John D. Cummins (D)
 * Ohio's 17th congressional district. George Fries (D)
 * Ohio's 18th congressional district. Samuel Lahm (D)
 * Ohio's 19th congressional district. John Crowell (W)
 * Ohio's 20th congressional district. Joshua R. Giddings (W)
 * Ohio's 21st congressional district. Joseph M. Root (W)

Pennsylvania

 * Pennsylvania's 1st congressional district. Lewis C. Levin (A)
 * Pennsylvania's 2nd congressional district. Joseph R. Ingersoll (W)
 * Pennsylvania's 3rd congressional district. Charles Brown (D)
 * Pennsylvania's 4th congressional district. Charles J. Ingersoll (D)
 * Pennsylvania's 5th congressional district. John Freedley (W)
 * Pennsylvania's 6th congressional district. John W. Hornbeck (W), until January 16, 1848
 * Samuel A. Bridges (D), from March 6, 1848
 * Pennsylvania's 7th congressional district. Abraham R. McIlvaine (W)
 * Pennsylvania's 8th congressional district. John Strohm (W)
 * Pennsylvania's 9th congressional district. William Strong (D)
 * Pennsylvania's 10th congressional district. Richard Brodhead (D)
 * Pennsylvania's 11th congressional district. Chester P. Butler (W)
 * Pennsylvania's 12th congressional district. David Wilmot (D)
 * Pennsylvania's 13th congressional district. James Pollock (W)
 * Pennsylvania's 14th congressional district. George N. Eckert (W)
 * Pennsylvania's 15th congressional district. Henry Nes (W)
 * Pennsylvania's 16th congressional district. Jasper E. Brady (W)
 * Pennsylvania's 17th congressional district. John Blanchard (W)
 * Pennsylvania's 18th congressional district. Andrew Stewart (W)
 * Pennsylvania's 19th congressional district. Job Mann (D)
 * Pennsylvania's 20th congressional district. John Dickey (W)
 * Pennsylvania's 21st congressional district. Moses Hampton (W)
 * Pennsylvania's 22nd congressional district. John W. Farrelly (W)
 * Pennsylvania's 23rd congressional district. James Thompson (D)
 * Pennsylvania's 24th congressional district. Alexander Irvin (W)

Rhode Island

 * Rhode Island's 1st congressional district. Robert B. Cranston (W)
 * Rhode Island's 2nd congressional district. Benjamin B. Thurston (D)

South Carolina

 * South Carolina's 1st congressional district. James A. Black (D), until April 3, 1848
 * Daniel Wallace (D), from June 12, 1848
 * South Carolina's 2nd congressional district. Richard F. Simpson (D)
 * South Carolina's 3rd congressional district. Joseph A. Woodward (D)
 * South Carolina's 4th congressional district. Alexander D. Sims (D), until November 22, 1848
 * John McQueen (D), from February 12, 1849
 * South Carolina's 5th congressional district. Armistead Burt (D)
 * South Carolina's 6th congressional district. Isaac E. Holmes (D)
 * South Carolina's 7th congressional district. Robert Rhett (D)

Tennessee

 * Tennessee's 1st congressional district. Andrew Johnson (D)
 * Tennessee's 2nd congressional district. William M. Cocke (W)
 * Tennessee's 3rd congressional district. John H. Crozier (W)
 * Tennessee's 4th congressional district. Hugh L. W. Hill (D)
 * Tennessee's 5th congressional district. George W. Jones (D)
 * Tennessee's 6th congressional district. James H. Thomas (D)
 * Tennessee's 7th congressional district. Meredith P. Gentry (W)
 * Tennessee's 8th congressional district. Washington Barrow (W)
 * Tennessee's 9th congressional district. Lucien B. Chase (D)
 * Tennessee's 10th congressional district. Frederick P. Stanton (D)
 * Tennessee's 11th congressional district. William T. Haskell (W)

Texas

 * Texas's 1st congressional district. David S. Kaufman (D)
 * Texas's 2nd congressional district. Timothy Pilsbury (D)

Vermont

 * Vermont's 1st congressional district. William Henry (W)
 * Vermont's 2nd congressional district. Jacob Collamer (W)
 * Vermont's 3rd congressional district. George P. Marsh (W)
 * Vermont's 4th congressional district. Lucius B. Peck (D)

Virginia

 * Virginia's 1st congressional district. Archibald Atkinson (D)
 * Virginia's 2nd congressional district. George Dromgoole (D), until April 27, 1847
 * Richard K. Meade (D), from August 5, 1847
 * Virginia's 3rd congressional district. Thomas S. Flournoy (W)
 * Virginia's 4th congressional district. Thomas S. Bocock (D)
 * Virginia's 5th congressional district. William L. Goggin (W)
 * Virginia's 6th congressional district. John M. Botts (W)
 * Virginia's 7th congressional district. Thomas H. Bayly (D)
 * Virginia's 8th congressional district. Richard L. T. Beale (D)
 * Virginia's 9th congressional district. John S. Pendleton (W)
 * Virginia's 10th congressional district. Henry Bedinger (D)
 * Virginia's 11th congressional district. James McDowell (D)
 * Virginia's 12th congressional district. William B. Preston (W)
 * Virginia's 13th congressional district. Andrew S. Fulton (W)
 * Virginia's 14th congressional district. Robert A. Thompson (D)
 * Virginia's 15th congressional district. William G. Brown Sr. (D)

Wisconsin

 * Wisconsin's 1st congressional district. William P. Lynde (D), from June 8, 1848 (newly admitted state)
 * Wisconsin's 2nd congressional district. Mason C. Darling (D), from June 8, 1848 (newly admitted state)

Non-voting members

 * Wisconsin Territory's at-large congressional district. John H. Tweedy (W), until May 29, 1848
 * Henry H. Sibley, from October 30, 1848



Changes in membership
The count below reflects changes from the beginning of the first session of this Congress.

Senate

 * Replacements: 11
 * Democrats (D): 4 seat net gain
 * Whigs (W): no net change
 * Deaths: 5
 * Resignations: 6
 * Interim appointments: 7
 * Seats of newly admitted states: 4


 * Tennessee (2)
 * Vacant
 * Failure to elect. Successor elected November 22, 1847.
 * | John Bell (W)
 * Elected November 22, 1847.
 * Elected November 22, 1847.


 * Iowa (2)
 * Vacant
 * Iowa had been admitted to the Union December 28, 1846, but the legislature failed to elect due to a three-way split that prevented any candidate from earning the required number of 30 legislators' votes. First Senator elected December 7, 1848.
 * | George Wallace Jones (D)
 * Elected December 7, 1848.
 * Elected December 7, 1848.


 * Iowa (3)
 * Vacant
 * Iowa had been admitted to the Union December 28, 1846, but the legislature failed to elect due to a three-way split that prevented any candidate from earning the required number of 30 legislators' votes. First Senator elected December 7, 1848.
 * | Augustus C. Dodge (D)
 * Elected December 7, 1848.
 * Elected December 7, 1848.


 * Mississippi (1)
 * | Jesse Speight (D)
 * Incumbent died May 1, 1847. Successor appointed August 10, 1847, and then elected January 1848.
 * | Jefferson Davis (D)
 * Appointed December 5, 1847.
 * Appointed December 5, 1847.


 * Connecticut (1)
 * | Jabez W. Huntington (W)
 * Incumbent died November 1, 1847. Successor appointed November 11, 1847, and then elected May 1848.
 * | Roger S. Baldwin (W)
 * Appointed December 5, 1847.
 * Appointed December 5, 1847.


 * Maine (1)
 * | John Fairfield (D)
 * Incumbent died December 24, 1847. Successor appointed January 5, 1848.
 * | Wyman B. S. Moor (D)
 * Appointed January 5, 1848.
 * Appointed January 5, 1848.


 * Georgia (3)
 * | Walter T. Colquitt (D)
 * Incumbent resigned February 4, 1848. Successor appointed February 4, 1848, to finish the term.
 * | Herschel V. Johnson (D)
 * Appointed February 4, 1848.
 * Appointed February 4, 1848.


 * Arkansas (3)
 * | Ambrose H. Sevier (D)
 * Incumbent resigned March 15, 1848. Successor appointed March 30, 1848, to finish the term.
 * | Solon Borland (D)
 * Appointed March 30, 1848.
 * Appointed March 30, 1848.


 * Arkansas (2)
 * | Chester Ashley (D)
 * Incumbent died April 29, 1848. Successor appointed May 12, 1848, and elected sometime thereafter.
 * | William K. Sebastian (D)
 * Elected May 12, 1848.
 * Elected May 12, 1848.


 * Wisconsin (1)
 * colspan=2 | Wisconsin admitted to the Union May 29, 1848. First Senator elected June 8, 1848.
 * | Henry Dodge (D)
 * Elected June 8, 1848.
 * Elected June 8, 1848.


 * Wisconsin (3)
 * colspan=2 | Wisconsin admitted to the Union May 29, 1848. First Senator elected June 8, 1848.
 * | Isaac P. Walker (D)
 * Elected June 8, 1848.
 * Elected June 8, 1848.


 * Michigan (1)
 * | Lewis Cass (D)
 * Incumbent resigned May 29, 1848, to run for U.S. President. Successor appointed June 8, 1848.
 * | Thomas Fitzgerald (D)
 * Elected June 8, 1848.
 * Elected June 8, 1848.


 * Maine (1)
 * | Wyman B. S. Moor (D)
 * Interim appointee retired when successor elected June 7, 1848.
 * | Hannibal Hamlin (D)
 * Elected June 7, 1848.
 * Elected June 7, 1848.


 * Kentucky (3)
 * | John J. Crittenden (W)
 * Incumbent resigned June 12, 1848, to run for Governor of Kentucky. Successor appointed June 23, 1848, and elected sometime thereafter.
 * | Thomas Metcalfe (W)
 * Elected June 23, 1848.
 * Elected June 23, 1848.


 * Alabama (3)
 * | Arthur P. Bagby (D)
 * Incumbent resigned June 16, 1848, to become U.S. Minister to Russia. Successor elected July 1, 1848.
 * | William R. King (D)
 * Elected July 1, 1848.
 * Elected July 1, 1848.


 * Alabama (2)
 * | Dixon H. Lewis (D)
 * Incumbent died October 25, 1848. Successor elected November 25, 1848.
 * | Benjamin Fitzpatrick (D)
 * Elected November 25, 1848.
 * Elected November 25, 1848.


 * Delaware (1)
 * | John M. Clayton (W)
 * Incumbent resigned February 23, 1849, to become U.S. Secretary of State. Successor elected February 23, 1849.
 * | John Wales (W)
 * Elected February 23, 1849.
 * }
 * }

House of Representatives

 * Replacements: 10
 * Democrats (D): no net change
 * Whigs (W): no net change
 * Deaths: 7
 * Resignations: 0
 * Contested election: 1
 * Seats of newly admitted states: 2
 * Total seats with changes: 12


 * Illinois's 5th congressional district
 * Vacant
 * Representative Stephen A. Douglas resigned at end of previous congress.
 * | William A. Richardson (D)
 * Seated December 6, 1847
 * Seated December 6, 1847


 * Virginia's 2nd congressional district
 * | George Dromgoole (D)
 * Incumbent died April 27, 1847.
 * | Richard K. Meade (D)
 * Seated August 5, 1847
 * Seated August 5, 1847


 * Michigan's 2nd congressional district
 * | Edward Bradley (D)
 * Incumbent died August 5, 1847.
 * | Charles E. Stuart (D)
 * Seated December 6, 1847
 * Seated December 6, 1847


 * Pennsylvania's 6th congressional district
 * | John W. Hornbeck (W)
 * Incumbent died January 16, 1848.
 * | Samuel A. Bridges (D)
 * Seated March 6, 1848
 * Seated March 6, 1848


 * Massachusetts's 8th congressional district
 * | John Quincy Adams (W)
 * Incumbent died February 23, 1848.
 * | Horace Mann (W)
 * Seated April 3, 1848
 * Seated April 3, 1848


 * New York's 27th congressional district
 * | John M. Holley (W)
 * Incumbent died March 8, 1848.
 * | Esbon Blackmar (W)
 * Seated December 4, 1848
 * Seated December 4, 1848


 * South Carolina's 1st congressional district
 * | James A. Black (D)
 * Incumbent died April 3, 1848.
 * | Daniel Wallace (D)
 * Seated June 12, 1848
 * Seated June 12, 1848


 * New York's 6th congressional district
 * | David S. Jackson (D)
 * James Monroe contested seat after which the House declared the seat vacant April 19, 1848.
 * | Horace Greeley (W)
 * Seated December 4, 1848
 * Seated December 4, 1848


 * Wisconsin's 1st congressional district
 * colspan=2 | Wisconsin admitted into the Union May 29, 1848, and seat remained vacant until June 8, 1848.
 * | William P. Lynde (D)
 * Seated June 8, 1848
 * Seated June 8, 1848


 * Wisconsin's 2nd congressional district
 * colspan=2 | Wisconsin admitted into the Union May 29, 1848, and seat remained vacant until June 8, 1848.
 * | Mason C. Darling (D)
 * Seated June 8, 1848
 * Seated June 8, 1848


 * Wisconsin Territory's at-large congressional district
 * | John H. Tweedy (W)
 * Incumbent was disqualified May 29, 1848, after the portion of territory he resided in achieved statehood.
 * Henry H. Sibley
 * Seated October 30, 1848
 * Seated October 30, 1848


 * South Carolina's 4th congressional district
 * | Alexander D. Sims (D)
 * Incumbent died November 22, 1848.
 * | John McQueen (D)
 * Seated February 12, 1849
 * Seated February 12, 1849


 * }

Committees
Lists of committees and their party leaders.

Senate

 * Agriculture (Chairman: Daniel Sturgeon)
 * Audit and Control the Contingent Expenses of the Senate (Chairman: Alpheus Felch then Isaac P. Walker)
 * Claims (Chairman: Moses Norris Jr.)
 * Commerce (Chairman: John Adams Dix)
 * Distributing Public Revenue Among the States (Select)
 * District of Columbia (Chairman: Herschel V. Johnson)
 * Expedition of John C. Fremont (Select)
 * Enrolled Bills (Chairman: Thomas J. Rusk)
 * Finance (Chairman: Charles G. Atherton)
 * Foreign Relations (Chairman: Ambrose H. Sevier then Edward A. Hannegan then Thomas Hart Benton)
 * Indian Affairs (Chairman: David R. Atchison)
 * Judiciary (Chairman: Andrew P. Butler)
 * Library (Chairman: James A. Pearce)
 * Manufactures (Chairman: Daniel S. Dickinson)
 * Memorial of Certain Cherokee Claimants (Select)
 * Military Affairs (Chairman: Lewis Cass then Thomas Hart Benton)
 * Militia (Chairman: Thomas J. Rusk)
 * Monuments to Deceased Senators (Select)
 * Naval Affairs (Chairman: David Levy Yulee)
 * Oregon Railroad (Select)
 * Ordnance and War Ships (Select)
 * Patents and the Patent Office (Chairman: James D. Westcott)
 * Pensions (Chairman: Henry Johnson)
 * Post Office and Post Roads (Chairman: John M. Niles)
 * Printing (Chairman: Simon Cameron)
 * Private Land Claims (Chairman: Solomon W. Downs)
 * Public Buildings and Grounds (Chairman: Robert M.T. Hunter)
 * Public Lands (Chairman: Sidney Breese then Alpheus Felch)
 * Retired List for the Army and the Navy (Select)
 * Retrenchment (Chairman: Hopkins L. Turney)
 * Seventh Census (Select)
 * Revolutionary Claims (Chairman: Jesse D. Bright)
 * Rivers and Harbors Convention in Chicago (Select)
 * Roads and Canals (Chairman: Edward A. Hannegan)
 * Tariff Bill of 1828 (Special)
 * Tariff Regulation (Select)
 * Territories (Chairman: Stephen A. Douglas)
 * Whole

House of Representatives

 * Accounts (Chairman: Daniel P. King)
 * Agriculture (Chairman: Hugh White)
 * Claims (Chairman: Joseph R. Ingersoll)
 * Commerce (Chairman: Washington Hunt)
 * District of Columbia (Chairman: John G. Chapman)
 * Elections (Chairman: Richard W. Thompson)
 * Engraving (Chairman: Lewis Charles Levin)
 * Enrolled Bills (Chairman: James G. Hampton)
 * Expenditures in the Navy Department (Chairman: Patrick W. Tompkins)
 * Expenditures in the Post Office Department (Chairman: James Wilson)
 * Expenditures in the State Department (Chairman: Daniel M. Barringer)
 * Expenditures in the Treasury Department (Chairman: Joseph M. Root)
 * Expenditures in the War Department (Chairman: John H. Crozier)
 * Expenditures on Public Buildings (Chairman: Edward Carrington Cabell)
 * Foreign Affairs (Chairman: John A. McClernand)
 * Indian Affairs (Chairman: Daniel M. Barringer)
 * Invalid Pensions (Chairman: Andrew S. Fulton)
 * Judiciary (Chairman: Joseph R. Ingersoll)
 * Manufactures (Chairman: Andrew Stewart)
 * Mileage (Chairman: Hiram Belcher)
 * Military Affairs (Chairman: John M. Botts)
 * Militia (Chairman: John B. Thompson)
 * Naval Affairs (Chairman: Thomas Butler King)
 * Patents (Chairman: John W. Farrelly)
 * Printing (Chairman: Harmon S. Conger)
 * Private Land Claims (Chairman: John Gayle)
 * Post Office and Post Roads (Chairman: William L. Goggin)
 * Public Buildings and Grounds (Chairman: John W. Houston)
 * Public Expenditures (Chairman: Thomas L. Clingman)
 * Public Lands (Chairman: Jacob Collamer)
 * Revisal and Unfinished Business (Chairman: Henry Nes)
 * Revolutionary Claims (Chairman: Daniel P. King)
 * Revolutionary Pensions (Chairman: William M. Cocke)
 * Roads and Canals (Chairman: Robert C. Schenck)
 * Rules (Select)
 * Standards of Official Conduct
 * Territories (Chairman: Caleb B. Smith)
 * Ways and Means (Chairman: Samuel F. Vinton)
 * Whole

Joint committees

 * Enrolled Bills
 * The Library
 * Printing

Employees

 * Librarian of Congress: John Silva Meehan

Senate

 * Chaplain: Henry Slicer (Methodist)
 * Secretary: Asbury Dickins
 * Sergeant at Arms: Robert Beale

House of Representatives

 * Chaplain: William T.S. Sprole (Presbyterian), until December 6, 1847
 * Ralph Gurley (Presbyterian), elected December 6, 1847
 * Clerk: Benjamin B. French, until December 8, 1847
 * Thomas J. Campbell, elected December 8, 1847
 * Doorkeeper: Robert E. Horner, elected December 8, 1847
 * Postmaster: John M. Johnson
 * Reading Clerks:
 * Sergeant at Arms: Newton Lane, until December 8, 1847
 * Nathan Sergeant, elected December 8, 1847