From the time of its admission to the Union in 1812, until the division into multiple districts a decade later, Louisiana had only one congressional district. During that time, three people represented the state at-large.
|Statehood achieved April 30, 1812|
Thomas B. Robertson
|Democratic-Republican||April 30, 1812 -
April 20, 1818
|Elected to finish the term.|
Also elected in 1812 to the next term.
Re-elected in 1814.
Re-elected in 1816.
|Vacant||April 20, 1818 -
November 16, 1818
|Thomas Butler||Democratic-Republican||November 16, 1818 -
March 3, 1821
|Elected to finish Robertson's term.|
Also elected in 1818 to the next term.
Josiah S. Johnston
|Democratic-Republican||March 4, 1821 -
March 3, 1823
|17th||Elected in 1820.|
|District inactive, returned to district representation|
George A. Sheridan
|Liberal Republican||March 4, 1873 -
March 3, 1875
|43rd||Elected in 1872.|
Election contested by P. B. S. Pinchback and settled in Sheridan's favor only one month before the end of the Congress.
At-large seat eliminated March 4, 1875, as all six seats were divided among six districts.