Joseph Charles McGarraghy (November 6, 1897 – November 29, 1975) was a United States federal judge.
Born in Washington, D.C., McGarraghy was in the United States Army from 1917 to 1920, and received an LL.B. from Georgetown University Law School in 1921. He was an Assistant corporation counsel from 1924 to 1925. He was in private practice in Washington, D.C., from 1925 to 1954. He was a President, Washington Board of Trade from 1946 to 1947. He was a Chairman, Greater National Capital Committee from 1947 to 1950. He was a Chairman, Republican State Committee, Washington, D.C. from 1949 to 1954. He was a Chairman, Eisenhower-Nixon Inaugural Committee in 1953.
Judge of the United States District Court for the District of Columbia, McGarraghy was nominated by President Dwight D. Eisenhower on November 10, 1954, to a seat vacated by Walter M. Bastian. He was confirmed by the United States Senate on December 2, 1954, and received his commission on December 3, 1954. He assumed senior status on December 17, 1967. McGarraghy served in that capacity until his death.