1st Illinois General Assembly

The 1st Illinois General Assembly, consisting of the Illinois Senate and the Illinois House of Representatives, met from October 4, 1818, to March 31, 1819, during the first two years of Shadrach Bond's governorship, at The Kaskaskia State House. The apportionment of seats in the House of Representatives was based on the provisions of the First Illinois Constitution. Political parties were not established in the State at the time.

It was succeeded by the 2nd Illinois General Assembly.

Members
This list is arranged by chamber, then by county. Senators and Representatives were both allotted to counties roughly by population and elected at-large within their districts. Two counties shared one senator.

Senate
Bond County
 * Martin Jones

Crawford County
 * Joseph Kitchell

Edwards County
 * Guy W. Smith

Gallatin County
 * Michael Jones

Jackson County
 * Conrad Will

Johnson and Franklin Counties
 * Thomas Roberts

Madison County
 * George Cadwell

Monroe County
 * Alexander Jamison

Pope County
 * Lewis Barker

St. Clair County
 * William Kinney

Randolph County
 * John McFerron, resigned July 8, 1819

Union County
 * Thomas Cox

Washington County
 * Zariah Maddux

White County
 * Willis Hargrave

House of Representatives
Bond County
 * Francis Kirkpatrick

Crawford County
 * David Porter
 * Scott Riggs

Edwards County
 * Levi Compton
 * Henry Utter

Franklin County
 * Elijah Ewing

Gallatin County
 * John G. Daimwood
 * Adolphus F. Hubbard
 * John Marshall, resigned

Jackson County
 * Jesse Griggs

Johnson County
 * Isaac D. Wilcox

Madison County
 * John Howard
 * Abraham Prickett
 * Samuel Whiteside

Monroe County
 * William Alexander

Pope County
 * Green B. Field
 * Robert Hamilton

St. Clair County
 * John Messinger
 * Risdon Moore
 * James D. Thomas

Randolph County
 * Edward Humphreys
 * Samuel Walker

Union County
 * Jesse Echols
 * John Whitaker

Washington County
 * Daniel S. Swearengen

White County
 * William McHenry
 * William Nash
 * Alexander Phillips

Senate

 * Secretary: William C. Greenup
 * Doorkeeper: Ezra Owen

House of Representatives

 * Clerk: Thomas Reynolds
 * Enrolling and Engrossing Clerk: Timothy Davis
 * Assistant Enrolling and Engrossing Clerk: Milton Ladd
 * Doorkeeper: Charles McNabb