1980Final results
1980 election for California Assembly District 30
California State Assembly · California
Jim Costa (D) won with 67.6% of the vote, defeating Carol Harner (R) by 35.3 points.
Jim CostaDemocrat · winner · incumbent
67.6%52,233
Carol HarnerRepublican
32.4%24,989
77,222 votes
Source: Harvard Dataverse / Carl KlarnerUpdated Sep 30, 2026, 7:29 AM ET
The seat over time
D − R margin in this seat's races around 1980
Races before and after
Source: Harvard Dataverse / Carl KlarnerUpdated Sep 30, 2026, 7:29 AM ET