Wyoming's congressional delegations

Wyoming has sent congressional delegations to the United States Senate and United States House of Representatives since it became a state in 1890. Before becoming a state, the Wyoming Territory elected a non-voting delegate at-large to Congress, beginning with the 41st United States Congress in 1869. Wyoming first sent a voting representative to Congress in the 51st United States Congress, following its statehood.

Each U.S. state elects two senators to serve for six years in general elections, with their re-election staggered. Prior to the ratification of the Seventeenth Amendment in 1913, Wyoming senators were elected by the Wyoming State Legislature; afterwards, senators were elected directly by the people of the state. Currently, Wyoming is represented in the Senate by John Barrasso and Cynthia Lummis.

Each state elects at least one member to the House of Representatives for a two-year term. The number of House members is proportional to the state's share of the national population, and changes every ten years with the results of the United States census. Wyoming has had one representative in the House since its statehood. Currently, Wyoming is represented in the House by Harriet Hageman.

Wyoming's congressional delegations have been exclusively composed of Republicans since the 96th United States Congress in 1979. The last Democrat to represent Wyoming in Congress was Teno Roncalio, who resigned in 1978 when he retired from the House of Representatives.