PolitiFinder

1978 Washington U.S. House District 4 Election

Washington · 2 candidates · See every 1978 U.S. House race

Who won the 1978 Washington U.S. House District 4 Election?

Mike McCormack won the 1978 Washington U.S. House District 4 Election. Mike McCormack received 85,602 popular votes (61.15%). The main challenger was Susan Roylance (38.85%).

See the full head-to-head between McCormack and Roylance

McCormack +22.3 pts · won by 31,213 votes
Mike McCormackDemocraticWINNER61.15%
85,602 votes
Susan RoylanceRepublican38.85%
54,389 votes
Popular-vote totals for U.S. House elections come from the MIT Election Data and Science Lab (1976–2024).

Data last verified July 28, 2026.