1978Final results
1978 election for Colorado's 3rd District
U.S. House · Colorado
Ray Kogovsek (D) won with 49.3% of the vote, defeating Harold L. "mack" McCormick (R) by 0.3 points.
Ray KogovsekDemocrat · winner
49.3%69,669
Harold L. "mack" McCormickRepublican
49.0%69,303
Henry John OlshawIndependent
1.7%2,470
141,442 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
The candidates
Ray Kogovsek (D)Harold L. "mack" McCormick (R)
Also on the ballot: Henry John Olshaw (Independent), 1.7%