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California House District 12 Election Results

Compiled by EveryElectionResult.com's data team · Last updated 2026-08-30

California House District 12 was held by Republican after the 2018 general election, a two-party margin of 20.9 points. This page covers every general election on record for this district from 1972 to 2018.

This page covers the state House (lower chamber) general election only, two-party vote totals (Democratic vs. Republican). District lines here are redrawn at least once a decade, so an older and newer election under the same district number don't necessarily cover the same voters -- see the sourcing note below.

Results by Election

ElectionWinning PartyDem. VotesGOP VotesDem. ShareMargin
1972 Republican 24,787 62,566 28.4% 43.2 pts
1974 Democratic 63,147 44,841 58.5% 16.9 pts
1976 Democratic 72,708 49,400 59.5% 19.1 pts
1978 Democratic 59,570 46,966 55.9% 11.8 pts
1980 Democratic 77,238 41,898 64.8% 29.7 pts
1982 Democratic 95,875 31,697 75.2% 50.3 pts
1984 Democratic 130,682 0 100.0% 100.0 pts
1986 Democratic 91,581 30,721 74.9% 49.8 pts
1988 Democratic 112,136 36,626 75.4% 50.8 pts
1990 Democratic 82,766 31,853 72.2% 44.4 pts
1992 Democratic 84,924 34,104 71.3% 42.7 pts
1994 Democratic 71,371 24,459 74.5% 49.0 pts
1996 Democratic 94,167 26,595 78.0% 56.0 pts
1998 Democratic 80,962 19,615 80.5% 61.0 pts
2000 Democratic 110,644 23,905 82.2% 64.5 pts
2002 Democratic 72,166 14,699 83.1% 66.2 pts
2004 Democratic 112,000 23,803 82.5% 64.9 pts
2006 Democratic 73,922 17,020 81.3% 62.6 pts
2008 Democratic 131,231 26,380 83.3% 66.5 pts
2010 Democratic 90,388 21,540 80.8% 61.5 pts
2012 Republican 58,517 89,821 39.5% 21.1 pts
2014 Republican 30,752 63,003 32.8% 34.4 pts
2016 Republican 0 156,113 0.0% 100.0 pts
2018 Republican 58,613 89,644 39.5% 20.9 pts

Winning Margin Over Time

1972: Republican margin 43.2 pts 1974: Democratic margin 16.9 pts 1976: Democratic margin 19.1 pts 1978: Democratic margin 11.8 pts 1980: Democratic margin 29.7 pts 1982: Democratic margin 50.3 pts 1984: Democratic margin 100.0 pts 1986: Democratic margin 49.8 pts 1988: Democratic margin 50.8 pts 1990: Democratic margin 44.4 pts 1992: Democratic margin 42.7 pts 1994: Democratic margin 49.0 pts 1996: Democratic margin 56.0 pts 1998: Democratic margin 61.0 pts 2000: Democratic margin 64.5 pts 2002: Democratic margin 66.2 pts 2004: Democratic margin 64.9 pts 2006: Democratic margin 62.6 pts 2008: Democratic margin 66.5 pts 2010: Democratic margin 61.5 pts 2012: Republican margin 21.1 pts 2014: Republican margin 34.4 pts 2016: Republican margin 100.0 pts 2018: Republican margin 20.9 pts 1972 1974 1976 1978 1980 1982 1984 1986 1988 1990 1992 1994 1996 1998 2000 2002 2004 2006 2008 2010 2012 2014 2016 2018

Frequently Asked Questions

Which party held California House District 12 at the 2018 election?

Republican held California House District 12 at the 2018 general election, with a two-party margin of 20.9 points.

Which parties have held California House District 12 since 1972?

Since 1972, California House District 12 has been held by: Democratic, Republican.

What was the closest two-party race on record in California House District 12?

The closest two-party margin on record for California House District 12 was 1978, at just 11.8 percentage points.