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 County results Hatfield: 50–60% 60–70% 70–80% Cook: 50–60% | |||||||||||||||||
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| Elections in Oregon |
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The 1978 United States Senate election in Oregon took place on November 7, 1978. Incumbent Republican Senator Mark Hatfield was re-elected to a third term in office, defeating Democrat Vernon Cook.
| Party | Candidate | Votes | % | |
|---|---|---|---|---|
| Republican | Mark Hatfield (incumbent) | 159,617 | 65.66% | |
| Republican | Bert W. Hawkins | 43,350 | 17.83% | |
| Republican | Robert D. Maxwell | 24,294 | 9.99% | |
| Republican | Richard L. Schnepel | 15,628 | 6.43% | |
| Write-in | All others | 197 | 0.07% | |
| Total votes | 243,086 | 100.00% | ||
| Party | Candidate | Votes | % | |
|---|---|---|---|---|
| Democratic | Vernon Cook | 151,754 | 58.32% | |
| Democratic | John Sweeney | 41,599 | 15.99% | |
| Democratic | Jack A. Brown | 35,211 | 13.53% | |
| Democratic | Steve Anderson | 30,066 | 11.56% | |
| Republican | Mark Hatfield (incumbent, write-in) | 1,106 | 0.39% | |
| Write-in | All others | 552 | 0.21% | |
| Total votes | 260,197 | 100.00% | ||
| Party | Candidate | Votes | % | ±% | |
|---|---|---|---|---|---|
| Republican | Mark Hatfield (incumbent) | 550,615 | 61.66% |  7.94 | |
| Democratic | Vernon Cook | 341,616 | 38.26% |  7.90 | |
| Write-in | All others | 737 | 0.08% | ||
| Total votes | 892,968 | 100.00% | |||
| Republican hold | Swing | ||||
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The 1978 United States Senate election in Alabama was held on November 7, 1978. Incumbent Democratic U.S. Senator John Sparkman decided to retire and Alabama Supreme Court Chief Justice Howell Heflin was elected to succeed him.
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The 1978 United States Senate election in Kentucky took place on November 7, 1978. Incumbent U.S. Senator Walter Dee Huddleston was re-elected to a second term. As of 2023, this was the last time Democrats or anyone other than Mitch McConnell won the Class 2 Senate seat in Kentucky.
The 1978 United States Senate election in New Hampshire took place on November 7, 1978. Incumbent Democratic Senator Thomas J. McIntyre ran for re-election to a third term but was defeated by Republican Gordon J. Humphrey.
The 1984 United States Senate election in Oregon took place on November 6, 1984. Incumbent Republican U.S. Senator Mark Hatfield was re-elected to a fourth term in office, defeating Democratic State Senator Margie Hendriksen. As of 2022, this is the last U.S. Senate race in Oregon where every county voted for the same candidate.
