Idaho's congressional delegations

Idaho's current congressional delegation in the consists of its two senators and two representatives, all of whom are Republicans. Idaho has not elected a Democratic member of Congress since Walt Minnick was elected in 2008; he was defeated by Republican Raúl Labrador two years later in 2010. As of April 2025, the Cook Partisan Voting Index, a measure of how strongly partisan congressional districts and states are, ranked both Idaho congressional districts and the state as a whole as solidly Republican. The dean, or longest-serving member of Congress, of the Idaho delegation is currently Mike Crapo, who has been serving in Congress since his election to the House of Representatives in 1992. After serving in the House for three terms, he was elected to the Senate in 1998. ==United States Senate==

26 people have served as a U.S. senator from Idaho, The longest-serving senator from Idaho, William Borah, was an influential Republican legislator who eventually became the dean of the Senate during his 33 years of service. He was known for his political views independent of the Republican Party and influence on the United States Senate Committee on Foreign Relations, eventually becoming its chairman. He was instrumental in the passage of the Sixteenth and the Seventeenth Amendments, establishing the graduated income tax and popular election of Senators, respectively, but opposed the Nineteenth Amendment, which prohibited disenfranchisement the right to vote on account of sex. The last Democratic senator from Idaho was Frank Church, who similarly served for 24 years on the Foreign Relations Committee, including two years as chairman. He also served as chairman of the Church Committee, whose reports helped pass the Foreign Intelligence Surveillance Act of 1978. Senator Jim McClure also rose to leadership positions, including as the chairman of the Senate Republican Conference from 1981 to 1985, and as the chairman of the United States Senate Committee on Energy and Natural Resources. Senators are elected every six years depending on their class, with each senator serving a six-year term, and elections for senators occurring every two years, rotating through each class such that in each election, around one-third of the seats in the Senate are up for election. Idaho's senators are elected in classes II and III. == United States House of Representatives ==

Since the establishment of Idaho Territory, 44 people have served Idaho in the House of Representatives. Of those, only two have been women: Gracie Pfost, who served in the House from 1953 to 1962, and Helen Chenoweth, who served in the House from 1995 to 2000. From 1864 to 1890, Idaho elected a non-voting delegate to the House. After statehood in 1890, the state sent one member to the House until 1913, when Idaho gained a seat in the House after the 1910 census. The representatives were elected at-large until Idaho's congressional districts were drawn in 1919. Districts are redrawn every ten years, after data from the US Census is collected. 1864–1890: 1 non-voting delegate Starting on February 1, 1864, Idaho Territory sent a non-voting delegate to the House. 1890–1913: 1 seat Following statehood on July 3, 1890, Idaho had one seat in the House. 1913–present: 2 seats Following the 1910 census, Idaho was apportioned a second seat. It elected both seats statewide at-large on a general ticket, until 1919, when it redistricted into two districts. ==See also==