1940 United States House of Representatives election in New Mexico

The 1940 United States House of Representatives election in New Mexico was held on Tuesday November 5, 1940 to elect the state's at-large representative to serve in the 77th United States Congress. Incumbent John J. Dempsey chose to run for the US Senate instead of seeking a fourth term in congress. Clinton Anderson won the open seat by 17.52% outperforming Franklin D. Roosevelt in the concurrent Presidential election by 4.21 percentage points.