The 2016 United States Senate election in Oregon was held November 8, 2016, to elect a member of the United States Senate to represent the State of Oregon, concurrently with the 2016 U.S. presidential election, as well as other elections to the United States Senate in other states and elections to the United States House of Representatives and various state and local elections.

Mark Allen Callahan is an American information technology consultant and perennial candidate. He was the Republican nominee in the 2016 United States Senate election in Oregon.