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2020 California U.S. House District 42 Election

California · 2 candidates · See every 2020 U.S. House race

Who won the 2020 California U.S. House District 42 Election?

Ken Calvert won the 2020 California U.S. House District 42 Election. Ken Calvert received 210,274 popular votes (57.13%). The main challenger was William O'Mara (42.87%).

See the full head-to-head between Calvert and O'Mara

Calvert +14.3 pts · won by 52,501 votes
Ken CalvertRepublicanWINNER57.13%
210,274 votes
William O'MaraDemocratic42.87%
157,773 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.