The 1986 United States Senate election in Oregon was held on November 8, 1986. Incumbent Republican Bob Packwood ran for re-election. U.S. Congressman Jim Weaver received the Democratic nomination. A populist Democratic congressman from Eugene, Oregon, he was a darling of the environmentalists. Weaver supported the Oregon Wilderness Act of 1984. Packwood was confident, despite the popular opponent, because had more money and a better campaign organization. After winning the party nomination, Weaver was the subject of a House Ethics Committee probe into his campaign finances, and withdrew his candidacy. Rick Bauman was selected to replace Weaver on the ballot, and lost handily to Packwood.

Democratic primary

Candidates

Declared

Withdrew

Results

After the primary, a House Ethics Committee probe into Weaver's campaign finances led him to withdraw his candidacy and the Oregon Democratic State Central Committee selected Bauman to replace Weaver on the ballot in August, just 10 weeks before the general election.

Republican primary

Candidates

Results

[[File:1986 US Senate election in Oregon Republican Primary.svg|thumb|200px|Republican Primary results by county: {{legend|#ed8783|Packwood}} {{legend|#ed8783|50–60%}} {{legend|#e55651|60–70%}} {{legend|#c88fe4|Lutz}} {{legend|#c88fe4|50–60%}} {{legend|#b368d9|60–70%}} {{legend|#7c31a2|80–90%}} ]]

General election

Candidates

Results