1948 United States Senate election in Virginia

The 1954 United States Senate elections was a midterm election in the first term of Dwight D. Eisenhower's presidency. The 32 Senate seats of Class 2 were contested in regular elections, and six special elections were held to fill vacancies. Eisenhower's Republican party lost a net of two seats to the Democratic opposition. This small change was just enough to give Democrats control of the chamber with the support of an Independent who agreed to caucus with them; he later officially joined the party in April 1955.

The 1948 United States Senate elections were held concurrently with the election of Democratic President Harry S. Truman for a full term. The 32 seats of Class 2 were contested in regular elections, and one special election was held to fill a vacancy. Truman campaigned against an "obstructionist" Congress that had blocked many of his initiatives, and additionally, the U.S. economy recovered from the postwar recession of 1946–1947 by election day. Thus, Truman was rewarded with a Democratic gain of nine seats in the Senate, enough to give them control of the chamber. This was the last time until 2020 that Democrats flipped a chamber of Congress in a presidential election cycle.

The 1948 United States House of Representatives elections were elections for the United States House of Representatives to elect members to serve in the 81st United States Congress. They were held for the most part on November 2, 1948, while Maine held theirs on September 13. These elections coincided with President Harry S. Truman's election to a full term. Truman had campaigned against a "do-nothing"' Republican Party Congress that had opposed his initiatives and was seen as counterproductive. The Democratic Party regained control of both the House and Senate in this election. For Democrats, this was their largest gain since 1932.

The 80th United States Congress was a meeting of the legislative branch of the United States federal government, composed of the United States Senate and the United States House of Representatives. It met in Washington, D.C. from January 3, 1947, to January 3, 1949, during the third and fourth years of Harry S. Truman's presidency. The apportionment of seats in this House of Representatives was based on the 1940 United States census.

The 1948 South Carolina United States Senate election was held on November 2, 1948 to select the U.S. Senator from the state of South Carolina. Incumbent Senator Burnet R. Maybank won the Democratic primary and defeated Republican challenger J. Bates Gerald in the general election to win another six-year term.

The 1948 United States elections were held on November 2, 1948. The election took place during the beginning stages of the Cold War. Democratic incumbent President Harry S. Truman was elected to a full term in an upset, defeating Republican nominee New York Governor Thomas E. Dewey and two erstwhile Democrats. The Democrats won back control of Congress from the Republicans. Until 2020, Democrats would never again flip a chamber of Congress in a presidential election cycle.

The United States Senate election of 1948 in Massachusetts was held on November 2, 1948, with Republican incumbent Leverett Saltonstall defeating his challengers.

The 1948 United States Senate election in Kentucky took place on November 2, 1948. Incumbent Republican Senator John Sherman Cooper, who won a 1946 special election to fill the vacant seat of Commissioner of Baseball Happy Chandler, ran for a full term in office but was defeated by Democratic U.S. Representative Virgil Chapman.

The 1948 United States Senate election in Montana took place on November 2, 1948. Incumbent United States Senator James E. Murray, who was first elected to the Senate in a special election in 1934 and was re-elected in 1936 and 1942, ran for re-election. After winning the Democratic primary, he faced Tom J. Davis, an attorney and the Republican nominee, in the general election. Following a narrow re-election in 1936, Murray significantly expanded his margin of victory and comfortably won re-election over Davis, resulting in him winning his fourth term and his third full term in the Senate.

The 1954 United States Senate election in Montana took place on November 2, 1954. Incumbent United States Senator James E. Murray, who was first elected to the Senate in a special election in 1934 and was re-elected in 1936, 1942, and 1948, ran for re-election. After winning the Democratic primary against trivial opponents, he advanced to the general election, where he was opposed by Wesley A. D'Ewart, the Republican nominee and the United States Congressman from Montana's 2nd congressional district. A contentious and close election ensued, but ultimately, Murray was able to narrowly win re-election over D'Ewart to a final term in the Senate.

The 1960 United States Senate election in Montana took place on November 8, 1960. Incumbent United States Senator James E. Murray, who was first elected to the Senate in a special election in 1934 and was re-elected in 1936, 1942, and 1948, and 1954, declined to seek re-election, creating an open seat. United States Congressman Lee Metcalf won out in a crowded Democratic primary and faced off against former United States Congressman Orvin B. Fjare, who won in a similarly-crowded Republican primary. Following a close general election, Metcalf narrowly defeated Fjare to win his first term in the Senate.

The 1948 United States Senate election in Alabama was held on November 2, 1948.

The 1948 United States Senate election in New Hampshire took place on November 2, 1948. Incumbent Republican Senator Styles Bridges won re-election to a third term in office, defeating Democrat Alfred Fortin.

The 1948 United States Senate election in Minnesota took place on November 2, 1948. It was the first election held for Minnesota's Class 2 seat in the United States Senate since the Minnesota Democratic Party and the Farmer-Labor Party of Minnesota merged in 1944 to form the Minnesota Democratic-Farmer-Labor Party. Democratic Mayor of Minneapolis and future Vice President Hubert H. Humphrey defeated incumbent Republican Joseph H. Ball, who sought a third term in the Senate. This is the first time a Democrat won a Senate seat in Minnesota through a popular vote election, as they last held a seat in 1901, and last won this seat in 1859.

The 1948 United States Senate election in Michigan was held on November 2, 1948. Incumbent Republican U.S. Senator Homer S. Ferguson was re-elected to a second term in office over U.S. Representative Frank E. Hook.

The 1948 United States Senate election in Iowa took place on November 2, 1948. Incumbent Republican Senator George A. Wilson ran for re-election to a second term but was defeated by Democratic former Senator Guy Gillette.

The 1948 United States Senate election in Illinois took place on November 2, 1948. Incumbent Republican Charles W. Brooks lost reelection in the landslide to Democrat Paul Douglas.

The 1948 United States Senate election in Colorado took place on November 2, 1948. Incumbent Democratic Senator Edwin C. Johnson was re-elected to third term in a landslide over Republican Will Nicholson, a businessman and Air Force veteran, winning every county in the state.

The United States Senate election of 1948 in New Jersey was held on November 2, 1948.

The 1948 Iowa State Senate elections took place as part of the biennial 1948 United States elections. Iowa voters elected state senators in 29 of the state senate's 50 districts. State senators serve four-year terms in the Iowa State Senate.