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.
List of members representing the district Representative Party Years Congress Electoral history 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.Resigned. 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.Lost renomination. Josiah S. Johnston Democratic-Republican March 4, 1821 –March 3, 1823 Elected in 1820.Redistricted to the and lost re-election. District inactive, returned to district representation
In the 43rd Congress, Louisiana had six representatives. Five were assigned a district and one represented the state at-large. Due to an election contest for the at-large seat, it was vacant until the very last day.
Representative Party Years Congress Electoral history George A. Sheridan Liberal Republican March 3, 1875 –March 4, 1875 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.Retired.
At-large seat eliminated March 4, 1875, as all six seats were divided among six districts.
References
Congressional Biographical Directory of the United States 1774–present