1978Final results
1978 election for U.S. Senate in Oregon
U.S. Senate · Oregon
Mark Hatfield (R) won with 61.6% of the vote, defeating Vern Cook (D) by 23.4 points.
Mark HatfieldRepublican · winner
61.6%550,165
Vern CookDemocrat
38.3%341,616
892,518 votes
Source: MIT Election Data and Science LabUpdated Sep 30, 2026, 7:25 AM ET
The seat over time
D − R margin in this seat's races around 1978
Races before and after
Source: MIT Election Data and Science LabUpdated Sep 30, 2026, 7:25 AM ET