The 1918 United States House of Representatives elections were elections for the United States House of Representatives to elect members to serve in the 66th United States Congress. They were held for the most part on November 5, 1918, while Maine held theirs on September 9. They occurred in the middle of President Woodrow Wilson's second term.

Frederick Huntington Gillett was an American politician who served as the 42nd Speaker of the United States House of Representatives from 1921 to 1925 and as a U.S. Senator from Massachusetts from 1925 to 1931. A Republican, Gillett first began his career in politics when he served in the Massachusetts House of Representatives from 1890 to 1891, and would go on to serve in the House from 1893 to 1925. At the time of his election, he was the oldest individual elected to a first term in the Senate, a record that he would hold until Peter Welch's victory in the 2022 United States Senate election in Vermont 98 years later.