The 1918 United States Senate election in Michigan took place on November 5, 1918. Incumbent Republican Senator William Alden Smith did not seek re-election to a third term in office. In the race to succeed him, Republican former Secretary of the Navy Truman Handy Newberry defeated the automobile industrialist Henry Ford. Ford first challenged Newberry in the Republican primary and lost and then faced Newberry again, running as the Democratic nominee in the general election.