These are tables of congressional delegations from Oklahoma to the United States House of Representatives and the United States Senate.
The current dean of the Oklahoma delegation is Representative Frank Lucas (R), having served in Congress since 1994.
After the 1910 census, Oklahoma gained three seats. From 1913 to 1915, these extra seats were represented at-large.
After 1915, all the seats were represented by districts. After the 1930 census, Oklahoma had its most seats, nine. The ninth seat represented the state at-large. After the 1940 census, the at-large seat was eliminated.