Special election to fill vacancy caused by the death of Alva B. Adams on December 1, 1941. Eugene Milikin was initially appointed to the seat on December 20, 1941.
Source for Popular Vote data: Colorado Secretary of State. Abstract of Votes Cast at a General Election Held on Tuesday, November 3rd, A.D. 1942, Colorado Secretary of State (https://www.sos.state.co.us/pubs/elections/Results/Abstract/pdf/1900-1999/1942AbstractBook.pdf) (accessed 21 Sep 2023)