List of United States senators from Louisiana

Louisiana was admitted to the Union on April 30, 1812, and elects senators to class 2 and class 3. Its current senators are Republicans Bill Cassidy and John Kennedy. Russell Long was the state's longest serving senator, served 1948–1987. Louisiana is one of fifteen states alongside Arizona, Colorado, Florida, Georgia, Hawaii, Idaho, Indiana, Maine, Massachusetts, Minnesota, Missouri, Nevada, South Dakota and Utah to have a younger senior senator and an older junior senator.

List of senators

 * - style="height:2em"
 * colspan=3 | Vacant
 * Apr 30, 1812 – Sep 3, 1812
 * Louisiana did not elect its senators until four months after statehood.
 * rowspan=7 | 1
 * rowspan=5
 * rowspan=5 | 1
 * Louisiana did not elect its senators until four months after statehood.
 * Apr 30, 1812 – Sep 3, 1812
 * colspan=3 | Vacant

! 1 ! rowspan=4 | 1
 * - style="height:2em"
 * align=left | Jean Noel Destrehan.jpg Jean Noël Destréhan
 * | Democratic- Republican
 * nowrap | Sep 3, 1812 – Oct 1, 1812
 * Resigned
 * rowspan=4 | Elected in 1812.
 * rowspan=4 nowrap | Sep 3, 1812 – Mar 3, 1813
 * rowspan=4 | Democratic- Republican
 * rowspan=4 align=right | Allan B. Magruder


 * - style="height:2em"
 * colspan=3 | Vacant
 * nowrap | Oct 1, 1812 – Oct 8, 1812

! 2
 * - style="height:2em"
 * align=left | Thomas Posey Portrait.jpg Thomas Posey
 * | Democratic- Republican
 * nowrap | Oct 8, 1812 – Feb 4, 1813
 * Appointed to continue Destréhan's term.Lost election to finish Destréhan's term.

! rowspan=3 | 3
 * - style="height:2em"
 * rowspan=3 align=left | Senator James Brown of Louisiana (1766-1835).jpg James Brown
 * rowspan=3 | Democratic- Republican
 * rowspan=3 nowrap | Feb 5, 1813 – Mar 3, 1817
 * rowspan=3 | Elected to finish Destréhan's term.Lost election to full term.

! rowspan=5 | 2
 * - style="height:2em"
 * rowspan=5 | 2
 * rowspan=5 | Elected in 1813 Retired.
 * rowspan=5 nowrap | Mar 4, 1813 – Mar 3, 1819
 * rowspan=5 | Democratic- Republican
 * rowspan=5 align=right | Eligius Fromentin
 * rowspan=5 align=right | Eligius Fromentin


 * - style="height:2em"

! 4
 * - style="height:2em"
 * align=left | Wcc claiborne.jpg William C. C. Claiborne
 * | Democratic- Republican
 * nowrap | Mar 4, 1817 – Nov 23, 1817
 * Elected in 1817.Died.
 * rowspan=5 | 2
 * rowspan=3


 * - style="height:2em"
 * colspan=3 | Vacant
 * nowrap | Nov 23, 1817 – Jan 12, 1818

! rowspan=6 | 5
 * - style="height:2em"
 * rowspan=6 align=left | H.S.Johnson.jpg Henry Johnson
 * rowspan=6 | Democratic- Republican
 * rowspan=6 nowrap | Jan 12, 1818 – May 27, 1824
 * rowspan=3 | Elected to finish Claiborne's term.

! rowspan=3 | 3
 * - style="height:2em"
 * rowspan=7 | 3
 * rowspan=3 | Elected in 1819.Resigned to become U.S. Minister to France.
 * rowspan=3 nowrap | Mar 4, 1819 – Dec 10, 1823
 * rowspan=3 | Democratic- Republican
 * rowspan=3 align=right | Senator James Brown of Louisiana (1766-1835).jpg James Brown
 * rowspan=3 align=right | Senator James Brown of Louisiana (1766-1835).jpg James Brown


 * - style="height:2em"


 * - style="height:2em"
 * rowspan=3 | Elected to full term in 1823.Resigned to become Governor of Louisiana.
 * rowspan=7 | 3
 * rowspan=5


 * - style="height:2em"
 * nowrap | Dec 10, 1823 – Jan 15, 1824
 * colspan=3 | Vacant
 * colspan=3 | Vacant

! rowspan=10 | 4
 * - style="height:2em"
 * rowspan=3 | Elected to finish Brown's term.
 * rowspan=10 nowrap | Jan 15, 1824 – May 19, 1833
 * rowspan=3 | Democratic- Republican
 * rowspan=10 align=right | JosiahSJohnston.jpg Josiah S. Johnston


 * - style="height:2em"
 * colspan=3 | Vacant
 * nowrap | May 27, 1824 – Nov 19, 1824

! rowspan=3 | 6
 * - style="height:2em"
 * rowspan=3 align=left | CharlesBouligny.jpg Dominique Bouligny
 * | Democratic- Republican
 * rowspan=3 nowrap | Nov 19, 1824 – Mar 3, 1829
 * rowspan=3 | Elected to finish Johnson's term.


 * - style="height:2em"
 * rowspan=2 | National Republican
 * rowspan=3 | 4
 * rowspan=3 | Elected to full term in 1825.
 * rowspan=7 | National Republican
 * rowspan=7 | National Republican


 * - style="height:2em"

! rowspan=2 | 7
 * - style="height:2em"
 * rowspan=2 align=left | Edward Livingston of New York.jpg Edward Livingston
 * rowspan=2 | Jacksonian
 * rowspan=2 nowrap | Mar 4, 1829 – May 24, 1831
 * rowspan=2 | Elected in 1829. Resigned to become U.S. Secretary of State.
 * rowspan=7 | 4


 * - style="height:2em"
 * rowspan=3
 * rowspan=10 | 5
 * rowspan=4 | Re-elected in 1831.Died.


 * - style="height:2em"
 * colspan=3 | Vacant
 * nowrap | May 24, 1831 – Nov 15, 1831

! rowspan=4 | 8
 * - style="height:2em"
 * rowspan=4 align=left | GeoAWagga.jpg George A. Waggaman
 * rowspan=4 | National Republican
 * rowspan=4 nowrap | Nov 15, 1831 – Mar 3, 1835
 * rowspan=4 | Elected to finish Livingston's term.


 * - style="height:2em"
 * rowspan=3


 * - style="height:2em"
 * nowrap | May 19, 1833 – Dec 19, 1833
 * colspan=3 | Vacant
 * colspan=3 | Vacant

! rowspan=3 | 5
 * - style="height:2em"
 * rowspan=3 | Elected to finish Johnston's term.Resigned due to ill health.
 * rowspan=3 nowrap | Dec 19, 1833 – Jan 5, 1837
 * rowspan=3 | National Republican
 * rowspan=3 align=right | Alex-Porter.jpg Alexander Porter


 * - style="height:2em"
 * colspan=3 | Vacant
 * nowrap | Mar 4, 1835 – Jan 13, 1836
 * Charles Gayarré (J) was elected in 1835, but resigned due to ill health.
 * rowspan=6 | 5
 * rowspan=4

! rowspan=5 | 9
 * - style="height:2em"
 * rowspan=5 align=left | Robert Carter Nicholas.jpg Robert C. Nicholas
 * rowspan=3 | Jacksonian
 * rowspan=5 nowrap | Jan 13, 1836 – Mar 3, 1841
 * rowspan=5 | Elected to finish Gauarré's term.


 * - style="height:2em"
 * nowrap | Jan 5, 1837 – Jan 12, 1837
 * colspan=3 | Vacant
 * colspan=3 | Vacant

! rowspan=4 | 6
 * - style="height:2em"
 * Elected to finish Porter's term.
 * rowspan=4 nowrap | Jan 12, 1837 – Mar 1, 1842
 * | Jacksonian
 * rowspan=4 align=right | A Mouton Senator from Louisiana.jpg Alexandre Mouton


 * - style="height:2em"
 * rowspan=2 | Democratic
 * rowspan=5 | 6
 * rowspan=3 | Re-elected in 1837.Resigned.
 * rowspan=3 | Democratic
 * rowspan=3 | Democratic


 * - style="height:2em"

! rowspan=7 | 10
 * - style="height:2em"
 * rowspan=7 align=left | Alexander Barrow.jpg Alexander Barrow
 * rowspan=7 | Whig
 * rowspan=7 nowrap | Mar 4, 1841 – Dec 29, 1846
 * rowspan=7 | Elected in 1840.Died.
 * rowspan=9 | 6


 * - style="height:2em"
 * nowrap | Mar 1, 1842 – Apr 14, 1842
 * colspan=3 | Vacant
 * colspan=3 | Vacant

! 7
 * - style="height:2em"
 * Appointed to finish Mouton's term.Lost election to full term.
 * nowrap | Apr 14, 1842 – Mar 3, 1843
 * | Whig
 * align=right | Charles Magill Conrad.jpg Charles Conrad

! 8
 * - style="height:2em"
 * rowspan=7 | 7
 * Elected in 1843, but due to ill health did not take his seat.Died.
 * nowrap | Mar 4, 1843 – Jan 13, 1844
 * | Whig
 * align=right | Alex-Porter.jpg Alexander Porter
 * align=right | Alex-Porter.jpg Alexander Porter


 * nowrap | Jan 13, 1844 – Feb 12, 1844
 * colspan=3 | Vacant
 * nowrap | Jan 13, 1844 – Feb 12, 1844
 * colspan=3 | Vacant

! rowspan=5 | 9
 * - style="height:2em"
 * rowspan=5 |Elected to finish Porter's termLost election to full term in 1849.
 * rowspan=5 nowrap | Feb 12, 1844 – Mar 3, 1849
 * rowspan=5 | Whig
 * rowspan=5 align=right | H.S.Johnson.jpg Henry Johnson


 * - style="height:2em"
 * rowspan=3


 * - style="height:2em"
 * colspan=3 | Vacant
 * nowrap | Dec 29, 1846 – Jan 21, 1847

! 11
 * - style="height:2em"
 * align=left | PSoule.jpg Pierre Soulé
 * | Democratic
 * nowrap | Jan 21, 1847 – Mar 3, 1847
 * Elected to finish Barrow's term.

! rowspan=3 | 12
 * - style="height:2em"
 * rowspan=3 align=left | SolomonDowns.jpg Solomon W. Downs
 * rowspan=3 | Democratic
 * rowspan=3 nowrap | Mar 4, 1847 – Mar 3, 1853
 * rowspan=3 | Elected in 1847.Lost re-election.
 * rowspan=3 | 7

! rowspan=3 | 10
 * - style="height:2em"
 * rowspan=5 | 8
 * rowspan=3 | Elected in 1848.Resigned to become U.S. Minister to Spain.
 * rowspan=3 nowrap | Mar 3, 1849 – Apr 11, 1853
 * rowspan=3 | Democratic
 * rowspan=3 align=right | PSoule.jpg Pierre Soulé
 * rowspan=3 align=right | PSoule.jpg Pierre Soulé


 * - style="height:2em"

! rowspan=6 | 13
 * - style="height:2em"
 * rowspan=6 align=left | Judah P Benjamin crop.jpg Judah P. Benjamin
 * rowspan=4 | Whig
 * rowspan=6 nowrap | Mar 4, 1853 – Feb 4, 1861
 * rowspan=5 | Elected in 1852.
 * rowspan=5 | 8
 * rowspan=3


 * - style="height:2em"
 * nowrap | Apr 11, 1853 – Dec 5, 1853
 * colspan=3 | Vacant
 * colspan=3 | Vacant

! rowspan=4 | 11
 * - style="height:2em"
 * Elected to finish Soulé's term.
 * rowspan=4 nowrap | Dec 5, 1853 – Feb 4, 1861
 * rowspan=4 | Democratic
 * rowspan=4 align=right | JSlidell.jpg John Slidell


 * - style="height:2em"
 * rowspan=4 | 9
 * rowspan=3 | Re-election year unknown.Resigned.
 * rowspan=3 | Re-election year unknown.Resigned.


 * - style="height:2em"
 * rowspan=2 | Democratic


 * - style="height:2em"
 * Re-elected in 1859.Withdrew.
 * rowspan=4 | 9
 * rowspan=2


 * - style="height:2em"
 * rowspan=5 colspan=3 | Vacant
 * rowspan=5 nowrap | Feb 4, 1861 – Jul 8, 1868
 * rowspan=5 | Civil War and Reconstruction
 * rowspan=6 | Civil War and Reconstruction
 * rowspan=6 nowrap | Feb 4, 1861 – Jul 9, 1868
 * rowspan=6 colspan=3 | Vacant


 * - style="height:2em"
 * rowspan=3 | 10
 * rowspan=3 | 10


 * - style="height:2em"


 * - style="height:2em"
 * rowspan=5 | 10


 * - style="height:2em"
 * rowspan=3
 * rowspan=6 | 11

! rowspan=3 | 14
 * - style="height:2em"
 * rowspan=3 align=left | John S. Harris - Brady-Handy.jpg John S. Harris
 * rowspan=3 | Republican
 * rowspan=3 nowrap | Jul 8, 1868 – Mar 3, 1871
 * rowspan=3 | Elected to finish incomplete term in 1868..

! rowspan=3 | 12
 * - style="height:2em"
 * rowspan=3 | Elected to finish incomplete term.Resigned to become Governor of Louisiana.
 * rowspan=3 nowrap | Jul 9, 1868 – Nov 1, 1872
 * rowspan=3 | Republican
 * rowspan=3 align=right | William P. Kellogg - Brady-Handy.jpg William Pitt Kellogg


 * - style="height:2em"

! rowspan=5 | 15
 * - style="height:2em"
 * rowspan=5 align=left | Joseph R. West - cwpbh 03614.jpg J. R. West
 * rowspan=5 | Republican
 * rowspan=5 nowrap | Mar 4, 1871 – Mar 3, 1877
 * rowspan=5 | Election year unknown.Retired.
 * rowspan=5 | 11
 * rowspan=2


 * - style="height:2em"
 * rowspan=3 | Senate declined to seat rival claimants William L. McMillen and P. B. S. Pinchback
 * rowspan=3 nowrap | Nov 1, 1872 – Jan 12, 1876
 * rowspan=3 colspan=3 | Vacant


 * - style="height:2em"
 * rowspan=4 | 12
 * rowspan=4 | 12


 * - style="height:2em"
 * rowspan=2

! rowspan=2 | 13
 * - style="height:2em"
 * rowspan=2 | Elected to finish incomplete term in 1876.Lost re-election.
 * rowspan=2 nowrap | Jan 12, 1876 – Mar 3, 1879
 * rowspan=2 | Democratic
 * rowspan=2 align=right | JamesBEustis.jpg James B. Eustis

! rowspan=3 | 16
 * - style="height:2em"
 * rowspan=3 align=left | William P. Kellogg - Brady-Handy.jpg William Pitt Kellogg
 * rowspan=3 | Republican
 * rowspan=3 nowrap | Mar 4, 1877 – Mar 3, 1883
 * rowspan=3 | Elected in 1876.Retired to run for U.S. House.
 * rowspan=3 | 12

! rowspan=3 | 14
 * - style="height:2em"
 * rowspan=3 | 13
 * rowspan=3 | Elected in 1879.Lost re-election.
 * rowspan=3 nowrap | Mar 4, 1879 – Mar 3, 1885
 * rowspan=3 | Democratic
 * rowspan=3 align=right | Benjamin F. Jonas - Brady-Handy.jpg Benjamin F. Jonas
 * rowspan=3 align=right | Benjamin F. Jonas - Brady-Handy.jpg Benjamin F. Jonas


 * - style="height:2em"

! rowspan=5 | 17
 * - style="height:2em"
 * rowspan=5 align=left | Randall L. Gibson - Brady-Handy.jpg Randall L. Gibson
 * rowspan=5 | Democratic
 * rowspan=5 nowrap | Mar 4, 1883 – Dec 15, 1892
 * rowspan=3 | Elected in 1882.
 * rowspan=3 | 13

! rowspan=3 | 15
 * - style="height:2em"
 * rowspan=3 | 14
 * rowspan=3 | Election year unknown.Retired.
 * rowspan=3 nowrap | Mar 4, 1885 – Mar 3, 1891
 * rowspan=3 | Democratic
 * rowspan=3 align=right | JamesBEustis.jpg James B. Eustis
 * rowspan=3 align=right | JamesBEustis.jpg James B. Eustis


 * - style="height:2em"


 * - style="height:2em"
 * rowspan=2 | Re-elected in 1889.Died.
 * rowspan=6 | 14

! rowspan=4 | 16
 * - style="height:2em"
 * rowspan=3
 * rowspan=6 | 15
 * rowspan=4 | Elected in 1891.Resigned to become U.S. Supreme Court Justice.
 * rowspan=4 nowrap | Mar 4, 1891 – Mar 12, 1894
 * rowspan=4 | Democratic
 * rowspan=4 align=right | Edward White, head-and-shoulders portrait, facing slightly left, 1905.jpg Edward Douglass White


 * - style="height:2em"
 * colspan=3 | Vacant
 * nowrap | Dec 15, 1892 – Dec 31, 1892

! rowspan=6 | 18
 * - style="height:2em"
 * rowspan=6 align=left | Donelson Caffery.jpg Donelson Caffery
 * rowspan=6 | Democratic
 * rowspan=6 nowrap | Dec 31, 1892 – Mar 3, 1901
 * rowspan=3 | Appointed to continue Gibson's term.Elected in 1894 to finish Gibson's term.


 * - style="height:2em"
 * rowspan=2

! rowspan=2 | 17
 * - style="height:2em"
 * rowspan=2 | Appointed to continue White's term.Elected in 1894 to finish White's term.Retired.
 * rowspan=2 nowrap | Mar 12, 1894 – Mar 3, 1897
 * rowspan=2 | Democratic
 * rowspan=2 align=right | Newton Crain Blanchard.jpg Newton C. Blanchard


 * - style="height:2em"
 * rowspan=3 | Elected in 1894 to the next term, before election to finish Gibson's term.Retired.
 * rowspan=3 | 15

! rowspan=7 | 18
 * - style="height:2em"
 * rowspan=3 | 16
 * rowspan=3 | Elected in 1896.
 * rowspan=7 nowrap | Mar 4, 1897 – Jun 28, 1910
 * rowspan=7 | Democratic
 * rowspan=7 align=right | Samuel Douglas McEnery.jpg Samuel D. McEnery
 * rowspan=7 align=right | Samuel Douglas McEnery.jpg Samuel D. McEnery


 * - style="height:2em"

! rowspan=8 | 19
 * - style="height:2em"
 * rowspan=8 align=left | Murphy James Foster.jpg Murphy J. Foster
 * rowspan=8 | Democratic
 * rowspan=8 nowrap | Mar 4, 1901 – Mar 3, 1913
 * rowspan=3 | Elected in 1900.
 * rowspan=3 | 16


 * - style="height:2em"
 * rowspan=3 | 17
 * rowspan=3 | Re-elected early in 1900.
 * rowspan=3 | Re-elected early in 1900.


 * - style="height:2em"


 * - style="height:2em"
 * rowspan=5 | Re-elected early in 1904. Lost renomination.
 * rowspan=5 | 17


 * - style="height:2em"
 * rowspan=3
 * rowspan=5 | 18
 * Re-elected in 1908. Died.


 * - style="height:2em"
 * nowrap | Jun 28, 1910 – Dec 7, 1910
 * colspan=3 | Vacant
 * colspan=3 | Vacant

! rowspan=3 | 19
 * - style="height:2em"
 * rowspan=3 |Elected to finish McEnery's term.Retired.
 * rowspan=3 nowrap | Dec 7, 1910 – Mar 3, 1915
 * rowspan=3 | Democratic
 * rowspan=3 align=right | JohnRThornton.jpg John Thornton


 * - style="height:2em"

! rowspan=12 | 20
 * - style="height:2em"
 * rowspan=12 align=left | JosephERansdell.jpg Joseph E. Ransdell
 * rowspan=12 | Democratic
 * rowspan=12 nowrap | Mar 4, 1913 – Mar 3, 1931
 * rowspan=6 | Elected in 1912.
 * rowspan=6 | 18

! rowspan=2 | 20
 * - style="height:2em"
 * rowspan=6 | 19
 * rowspan=2 | Elected early in 1912.Died.
 * rowspan=2 nowrap | Mar 4, 1915 – Apr 12, 1918
 * rowspan=2 | Democratic
 * rowspan=2 align=right | Robert Foligny Broussard.jpg Robert F. Broussard
 * rowspan=2 align=right | Robert Foligny Broussard.jpg Robert F. Broussard


 * - style="height:2em"
 * rowspan=4


 * - style="height:2em"
 * nowrap | Apr 12, 1918 – Apr 22, 1918
 * colspan=3 | Vacant
 * colspan=3 | Vacant

! 21
 * - style="height:2em"
 * Appointed to continue Broussard's term.Retired when elected successor qualified.
 * nowrap | Apr 22, 1918 – Nov 5, 1918
 * | Democratic
 * align=right | WalterGuion.jpg Walter Guion

! rowspan=2 | 22
 * - style="height:2em"
 * rowspan=2 | Elected to finish Broussard's term.Retired.
 * rowspan=2 nowrap | Nov 6, 1918 – Mar 3, 1921
 * rowspan=2 | Democratic
 * rowspan=2 align=right | GAY, SEN. E.J. LCCN2016860338 (3x4a).jpg Edward J. Gay


 * - style="height:2em"
 * rowspan=3 | Re-elected in 1918.
 * rowspan=3 | 19

! rowspan=7 | 23
 * - style="height:2em"
 * rowspan=3 | 20
 * rowspan=3 | Elected in 1920.
 * rowspan=7 nowrap | Mar 4, 1921 – Mar 3, 1933
 * rowspan=7 | Democratic
 * rowspan=7 align=right |EdwinSBroussard.jpg Edwin S. Broussard
 * rowspan=7 align=right |EdwinSBroussard.jpg Edwin S. Broussard


 * - style="height:2em"


 * - style="height:2em"
 * rowspan=3 | Re-elected in 1924.Lost renomination.
 * rowspan=3 | 20


 * - style="height:2em"
 * rowspan=4 | 21
 * rowspan=4 | Re-elected in 1926.Lost renomination.
 * rowspan=4 | Re-elected in 1926.Lost renomination.


 * - style="height:2em"


 * - style="height:2em"
 * colspan=3 | Vacant
 * nowrap | Mar 4, 1931 – Jan 25, 1932
 * rowspan=6 | 21
 * rowspan=2
 * rowspan=2

! rowspan=3 | 21
 * - style="height:2em"
 * rowspan=3 align=left | Huey Long (cropped).jpg Huey Long
 * rowspan=3 | Democratic
 * rowspan=3 nowrap | Jan 25, 1932 – Sep 10, 1935
 * rowspan=3 | Elected in 1930, but continued to serve as Louisiana governor until Jan 25, 1932.Assassinated.

! rowspan=10 | 24
 * - style="height:2em"
 * rowspan=5 | 22
 * rowspan=5 | Elected in 1932.
 * rowspan=10 nowrap | Mar 4, 1933 – May 14, 1948
 * rowspan=10 | Democratic
 * rowspan=10 align=right | John Overton.jpg John Overton
 * rowspan=10 align=right | John Overton.jpg John Overton


 * - style="height:2em"
 * rowspan=3


 * - style="height:2em"
 * colspan=3 | Vacant
 * nowrap | Sep 10, 1935 – Jan 31, 1936

! 22
 * - style="height:2em"
 * align=left | RoseLong.jpg Rose M. Long
 * | Democratic
 * nowrap | Jan 31, 1936 – Jan 3, 1937
 * Appointed to continue her husband's term.Elected in 1936 to finish her husband's term.Retired.

! rowspan=21 | 23
 * - style="height:2em"
 * rowspan=21 align=left | AllenJosephEllender.jpg Allen Ellender
 * rowspan=21 | Democratic
 * rowspan=21 nowrap | Jan 3, 1937 – July 27, 1972
 * rowspan=3 | Elected in 1936.
 * rowspan=3 | 22


 * - style="height:2em"
 * rowspan=3 | 23
 * rowspan=3 | Re-elected in 1938.
 * rowspan=3 | Re-elected in 1938.


 * - style="height:2em"


 * - style="height:2em"
 * rowspan=6 | Re-elected in 1942.
 * rowspan=6 | 23


 * - style="height:2em"
 * rowspan=6 | 24
 * rowspan=2 | Re-elected in 1944.Died.
 * rowspan=2 | Re-elected in 1944.Died.


 * - style="height:2em"
 * rowspan=4


 * - style="height:2em"
 * nowrap | May 14, 1948 – May 18, 1948
 * colspan=3 | Vacant
 * colspan=3 | Vacant

! 25
 * - style="height:2em"
 * Appointed to continue Overton's term.Retired when elected successor qualified.
 * nowrap | May 18, 1948 – Dec 30, 1948
 * | Democratic
 * align=right | William Feazel.jpg William C. Feazel

! rowspan=23 | 26
 * - style="height:2em"
 * rowspan=2 | Elected to finish Overton's term.
 * rowspan=23 nowrap | Dec 31, 1948 – Jan 3, 1987
 * rowspan=23 | Democratic
 * rowspan=23 align=right | Russell Billiu Long.jpg Russell Long


 * - style="height:2em"
 * rowspan=3 | Re-elected in 1948.
 * rowspan=3 | 24


 * - style="height:2em"
 * rowspan=3 | 25
 * rowspan=3 | Re-elected in 1950.
 * rowspan=3 | Re-elected in 1950.


 * - style="height:2em"


 * - style="height:2em"
 * rowspan=3 | Re-elected in 1954.
 * rowspan=3 | 25


 * - style="height:2em"
 * rowspan=3 | 26
 * rowspan=3 | Re-elected in 1956.
 * rowspan=3 | Re-elected in 1956.


 * - style="height:2em"


 * - style="height:2em"
 * rowspan=3 | Re-elected in 1960.
 * rowspan=3 | 26


 * - style="height:2em"
 * rowspan=3 | 27
 * rowspan=3 | Re-elected in 1962.
 * rowspan=3 | Re-elected in 1962.


 * - style="height:2em"


 * - style="height:2em"
 * rowspan=3 | Re-elected in 1966.Died.
 * rowspan=6 | 27


 * - style="height:2em"
 * rowspan=6 | 28
 * rowspan=6 | Re-elected in 1968.
 * rowspan=6 | Re-elected in 1968.


 * - style="height:2em"
 * rowspan=4


 * - style="height:2em"
 * colspan=3 | Vacant
 * nowrap | Jul 27, 1972 – Aug 1, 1972

! 24
 * - style="height:2em"
 * align=left | Elaine Edwards (D-LA).jpg Elaine Edwards
 * | Democratic
 * nowrap | Aug 1, 1972 – Nov 13, 1972
 * Appointed by her husband to continue Ellender's term.Retired when successor qualified and resigned early.

! rowspan=13 | 25
 * - style="height:2em"
 * rowspan=13 align=left | J000189.jpg J. Bennett Johnston
 * rowspan=13 | Democratic
 * rowspan=13 nowrap | Nov 14, 1972 – Jan 3, 1997
 * Appointed to finish Ellender's term, having already been elected to the next term.


 * - style="height:2em"
 * rowspan=3 | Elected in 1972.
 * rowspan=3 | 28


 * - style="height:2em"
 * rowspan=3 | 29
 * rowspan=3 | Re-elected in 1974.
 * rowspan=3 | Re-elected in 1974.


 * - style="height:2em"


 * - style="height:2em"
 * rowspan=3 | Re-elected in 1978.
 * rowspan=3 | 29


 * - style="height:2em"
 * rowspan=3 | 30
 * rowspan=3 | Re-elected in 1980.Retired.
 * rowspan=3 | Re-elected in 1980.Retired.


 * - style="height:2em"


 * - style="height:2em"
 * rowspan=3 | Re-elected in 1984.
 * rowspan=3 | 30

! rowspan=9 | 27
 * - style="height:2em"
 * rowspan=3 | 31
 * rowspan=3 | Elected in 1986.
 * rowspan=9 nowrap | Jan 3, 1987 – Jan 3, 2005
 * rowspan=9 | Democratic
 * rowspan=9 align=right | John Breaux, official photo portrait, standing.jpg John Breaux
 * rowspan=9 align=right | John Breaux, official photo portrait, standing.jpg John Breaux


 * - style="height:2em"


 * - style="height:2em"
 * rowspan=3 | Re-elected in 1990.Retired.
 * rowspan=3 | 31


 * - style="height:2em"
 * rowspan=3 | 32
 * rowspan=3 | Re-elected in 1992.
 * rowspan=3 | Re-elected in 1992.


 * - style="height:2em"

! rowspan=9 | 26
 * - style="height:2em"
 * rowspan=9 align=left | Mary Landrieu Senate portrait.jpg Mary Landrieu
 * rowspan=9 | Democratic
 * rowspan=9 nowrap | Jan 3, 1997 – Jan 3, 2015
 * rowspan=3 | Elected in 1996.
 * rowspan=3 | 32


 * - style="height:2em"
 * rowspan=3 | 33
 * rowspan=3 | Re-elected in 1998.Retired.
 * rowspan=3 | Re-elected in 1998.Retired.


 * - style="height:2em"


 * - style="height:2em"
 * rowspan=3 | Re-elected in 2002 in runoff election.
 * rowspan=3 | 33

! rowspan=6 | 28
 * - style="height:2em"
 * rowspan=3 | 34
 * rowspan=3 | Elected in 2004.
 * rowspan=6 nowrap | Jan 3, 2005 – Jan 3, 2017
 * rowspan=6 | Republican
 * rowspan=6 align=right | DVitterOfficial.jpg David Vitter
 * rowspan=6 align=right | DVitterOfficial.jpg David Vitter


 * - style="height:2em"


 * - style="height:2em"
 * rowspan=3 | Re-elected in 2008.Lost re-election.
 * rowspan=3 | 34


 * - style="height:2em"
 * rowspan=3 | 35
 * rowspan=3 | Re-elected in 2010.Retired.
 * rowspan=3 | Re-elected in 2010.Retired.


 * - style="height:2em"

! rowspan=6 | 27
 * - style="height:2em"
 * rowspan=6 align=left | Bill Cassidy official Senate photo.jpg Bill Cassidy
 * rowspan=6 | Republican
 * rowspan=6 nowrap | Jan 3, 2015 – present
 * rowspan=3 | Elected in 2014 in runoff election.
 * rowspan=3 | 35

! rowspan=6 | 29
 * - style="height:2em"
 * rowspan=3 | 36
 * rowspan=3 | Elected in 2016 in runoff election.
 * rowspan=6 nowrap | Jan 3, 2017 – present
 * rowspan=6 | Republican
 * rowspan=6 align=right | John Neely Kennedy, official portrait, 115th Congress 2.jpg John Kennedy
 * rowspan=6 align=right | John Neely Kennedy, official portrait, 115th Congress 2.jpg John Kennedy


 * - style="height:2em"


 * - style="height:2em"
 * rowspan=3 | Re-elected in 2020.
 * rowspan=3 | 36


 * - style="height:2em"
 * rowspan=3 |37
 * rowspan=3 | Re-elected in 2022.
 * rowspan=3 | Re-elected in 2022.


 * - style="height:2em"


 * - style="height:2em"
 * rowspan=2 colspan=5 | To be determined in the 2026 election.
 * rowspan=2 | 37


 * - style="height:2em"
 * 38
 * colspan=5 | To be determined in the 2028 election.
 * colspan=5 | To be determined in the 2028 election.