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California House District 78 Election Results

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

California House District 78 was held by Democratic after the 2018 general election, a two-party margin of 42.1 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 Democratic 54,054 51,417 51.2% 2.5 pts
1974 Democratic 52,519 28,980 64.4% 28.9 pts
1976 Democratic 60,379 46,374 56.6% 13.1 pts
1978 Democratic 48,867 39,963 55.0% 10.0 pts
1980 Democratic 60,871 47,827 56.0% 12.0 pts
1982 Democratic 60,494 41,041 59.6% 19.2 pts
1984 Democratic 83,193 40,092 67.5% 35.0 pts
1986 Democratic 53,662 38,127 58.5% 16.9 pts
1988 Democratic 78,606 49,919 61.2% 22.3 pts
1990 Democratic 41,178 40,561 50.4% 0.8 pts
1992 Democratic 81,819 63,293 56.4% 12.8 pts
1994 Democratic 63,557 53,980 54.1% 8.2 pts
1996 Democratic 69,587 65,440 51.5% 3.1 pts
1998 Democratic 65,566 44,484 59.6% 19.2 pts
2000 Democratic 79,764 54,700 59.3% 18.6 pts
2002 Republican 44,247 45,826 49.1% 1.8 pts
2004 Republican 74,888 76,886 49.3% 1.3 pts
2006 Republican 46,846 51,983 47.4% 5.2 pts
2008 Democratic 93,938 75,350 55.5% 11.0 pts
2010 Democratic 72,036 49,455 59.3% 18.6 pts
2012 Democratic 116,987 70,526 62.4% 24.8 pts
2014 Democratic 72,224 45,088 61.6% 23.1 pts
2016 Democratic 145,850 65,134 69.1% 38.3 pts
2018 Democratic 137,039 55,816 71.1% 42.1 pts

Winning Margin Over Time

1972: Democratic margin 2.5 pts 1974: Democratic margin 28.9 pts 1976: Democratic margin 13.1 pts 1978: Democratic margin 10.0 pts 1980: Democratic margin 12.0 pts 1982: Democratic margin 19.2 pts 1984: Democratic margin 35.0 pts 1986: Democratic margin 16.9 pts 1988: Democratic margin 22.3 pts 1990: Democratic margin 0.8 pts 1992: Democratic margin 12.8 pts 1994: Democratic margin 8.2 pts 1996: Democratic margin 3.1 pts 1998: Democratic margin 19.2 pts 2000: Democratic margin 18.6 pts 2002: Republican margin 1.8 pts 2004: Republican margin 1.3 pts 2006: Republican margin 5.2 pts 2008: Democratic margin 11.0 pts 2010: Democratic margin 18.6 pts 2012: Democratic margin 24.8 pts 2014: Democratic margin 23.1 pts 2016: Democratic margin 38.3 pts 2018: Democratic margin 42.1 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 78 at the 2018 election?

Democratic held California House District 78 at the 2018 general election, with a two-party margin of 42.1 points.

Which parties have held California House District 78 since 1972?

Since 1972, California House District 78 has been held by: Democratic, Republican.

What was the closest two-party race on record in California House District 78?

The closest two-party margin on record for California House District 78 was 1990, at just 0.8 percentage points.