The 1978 United States Senate election in Virginia was held on November 7, 1978. Incumbent Republican Senator William L. Scott did not run for re-election to a second term. Republican former Secretary of the Navy John Warner narrowly defeated Democratic Attorney General of Virginia Andrew P. Miller to succeed him. Originally, this election was a match between Republican Richard Obenshain and Miller, then Obenshain died in a plane crash, leaving the party in disarray. Warner was then nominated to run in Obenshain's place, and his victorious election thrust him into a thirty-year career in the United States Senate, which started with this election.