William Munford Tuck (September 28, 1896 – June 9, 1983) was an American lawyer and lieutenant in the Byrd Organization, who served as the 55th Governor of Virginia from 1946 to 1950 as a Democrat, and as a U.S.

He was named for his grandfather William Munford Tuck (1832–1899), who served in the Third Virginia Infantry during the American Civil War.

Upon being admitted to Virginia bar, Tuck maintained a private legal practice in Halifax for decades, eventually with his stepson L.L.

During the national New Deal, state Senator Tuck worked to repeal Prohibition and sponsored new child labor laws, as well as an unemployment compensation system, old age assistance and jail reforms.

As governor from 1946 to 1950, Tuck demonstrated his fiscal conservatism as a Dixiecrat by reorganizing state government and enacting a right-to-work law.

Once, as governor, Tuck drafted workers of the Virginia Electric Power Company into the state's national guard to avoid a threatened strike in an unionization effort.

Tuck's resumption of legal practice in South Boston after his governorship proved short-lived, for he rose within the Byrd Organization.

In 1953 Tuck won election as a Democrat to U.S. Congress vacated by Thomas Bahnson Stanley who had resigned to run for Governor of Virginia.

He was a delegate to Democratic National Conventions of 1948 and 1952, and in 1967 announced he would not seek reelection to Congress, citing health problems.