The 1920 United States House of Representatives election in New Mexico was held on November 2, 1920, to elect the state's at-large representative. Incumbent Republican Benigno C. Hernández chose not to run for re-election to a third term.
This was the first time republicans won this district in back to back elections. Montoya under performed Warren G. Harding's performance in the concurrent presidential election by about 5 percentage points.