1978 United States Senate election in Oregon
{{Short description|none}}
{{Use mdy dates|date=September 2023}}
{{Infobox election
| election_name = 1978 United States Senate election in Oregon
| country = Oregon
| flag_year = 1931
| type = presidential
| ongoing = no
| previous_election = 1972 United States Senate election in Oregon
| previous_year = 1972
| next_election = 1984 United States Senate election in Oregon
| next_year = 1984
| election_date = November 7, 1978
| image1 = File:Mark Hatfield – 1967 (cropped).jpg
| image_size = 150x150px
| nominee1 = Mark Hatfield
| party1 = Republican Party (United States)
| popular_vote1 = 550,615
| percentage1 = 61.66%
| image2 = File:Vern Cook.jpg
| nominee2 = Vernon Cook
| party2 = Democratic Party (United States)
| popular_vote2 = 341,616
| percentage2 = 38.26%
| map_image = 1978 United States Senate election in Oregon results map by county.svg
| map_size = 250px
| map_caption = County results
Hatfield: {{legend0|#e27f7f|50–60%}} {{legend0|#d75d5d|60–70%}} {{legend0|#d72f30|70–80%}}
Cook: {{legend0|#7996e2|50–60%}}
| title = U.S. Senator
| before_election = Mark Hatfield
| before_party = Republican Party (United States)
| after_election = Mark Hatfield
| after_party = Republican Party (United States)
}}
{{ElectionsOR}}
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.
Republican primary
=Candidates=
- Mark Hatfield, incumbent Senator
- Bert W. Hawkins
- Robert D. Maxwell
- Richard L. Schnepel
=Results=
{{Election box begin no change
| title=1978 Republican Senate primary{{Cite web|url=https://www.ourcampaigns.com/RaceDetail.html?RaceID=267728|title = Our Campaigns - OR US Senate- R Primary Race - May 23, 1978}}
}}
{{Election box winning candidate with party link no change
| party = Republican Party (United States)
| candidate = Mark Hatfield (incumbent)
| votes = 159,617
| percentage = 65.66%
}}
{{Election box candidate with party link no change
| party = Republican Party (United States)
| candidate = Bert W. Hawkins
| votes = 43,350
| percentage = 17.83%
}}
{{Election box candidate with party link no change
| party = Republican Party (United States)
| candidate = Robert D. Maxwell
| votes = 24,294
| percentage = 9.99%
}}
{{Election box candidate with party link no change
| party = Republican Party (United States)
| candidate = Richard L. Schnepel
| votes = 15,628
| percentage = 6.43%
}}
{{Election box candidate no change
| party = Write-in
| candidate = All others
| votes = 197
| percentage = 0.07%
}}
{{Election box total no change
| votes = 243,086
| percentage = 100.00%
}}
{{Election box end}}
Democratic primary
=Candidates=
=Results=
{{Election box begin no change
| title=1978 Democratic Senate primary{{Cite web|url=https://www.ourcampaigns.com/RaceDetail.html?RaceID=267727|title = Our Campaigns - OR US Senate- D Primary Race - May 23, 1978}}
}}
{{Election box winning candidate with party link no change
| party = Democratic Party (United States)
| candidate = Vernon Cook
| votes = 151,754
| percentage = 58.32%
}}
{{Election box candidate with party link no change
| party = Democratic Party (United States)
| candidate = John Sweeney
| votes = 41,599
| percentage = 15.99%
}}
{{Election box candidate with party link no change
| party = Democratic Party (United States)
| candidate = Jack A. Brown
| votes = 35,211
| percentage = 13.53%
}}
{{Election box candidate with party link no change
| party = Democratic Party (United States)
| candidate = Steve Anderson
| votes = 30,066
| percentage = 11.56%
}}
{{Election box candidate with party link no change
| party = Republican Party (United States)
| candidate = Mark Hatfield (incumbent, write-in)
| votes = 1,106
| percentage = 0.39%
}}
{{Election box candidate no change
| party = Write-in
| candidate = All others
| votes = 552
| percentage = 0.21%
}}
{{Election box total no change
| votes = 260,197
| percentage = 100.00%
}}
{{Election box end}}
General election
=Results=
{{Election box begin
| title=General election results{{Cite web|url=https://www.ourcampaigns.com/RaceDetail.html?RaceID=5299|title = Our Campaigns - OR US Senate Race - Nov 07, 1978}}{{Cite web | url= http://clerk.house.gov/member_info/electionInfo/1978election.pdf | title=Statistics of the Congressional Election of November 7, 1978 | author=Clerk of the United States House of Representatives | publisher=U.S. Government Printing Office | year=1979}}
}}
{{Election box winning candidate with party link
| party = Republican Party (United States)
| candidate = Mark Hatfield (incumbent)
| votes = 550,615
| percentage = 61.66%
| change = {{increase}}7.94
}}
{{Election box candidate with party link
| party = Democratic Party (United States)
| candidate = Vernon Cook
| votes = 341,616
| percentage = 38.26%
| change = {{decrease}}7.90
}}
{{Election box candidate no change
| party = Write-in
| candidate = All others
| votes = 737
| percentage = 0.08%
| change = {{decrease}}0.04
}}
{{Election box total no change
| votes = 892,968
| percentage = 100.00%
}}
{{Election box hold with party link
| winner = Republican Party (United States)
| swing =
}}
{{Election box end}}