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Oregon House District 31 Election Results

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

Oregon House District 31 was held by Democratic after the 2018 general election, a two-party margin of 7.6 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 4,587 10,010 31.4% 37.1 pts
1974 Republican 3,945 9,090 30.3% 39.5 pts
1976 Republican 8,071 9,891 44.9% 10.1 pts
1978 Republican 7,540 9,965 43.1% 13.8 pts
1980 Republican 11,189 11,250 49.9% 0.3 pts
1982 Democratic 12,089 7,682 61.1% 22.3 pts
1984 Democratic 14,706 8,744 62.7% 25.4 pts
1986 Democratic 10,284 9,934 50.9% 1.7 pts
1988 Republican 11,444 11,860 49.1% 1.8 pts
1990 Republican 7,541 13,639 35.6% 28.8 pts
1992 Republican 10,556 15,705 40.2% 19.6 pts
1994 Democratic 12,429 11,685 51.5% 3.1 pts
1996 Democratic 13,882 12,509 52.6% 5.2 pts
1998 Republican 9,020 12,830 41.3% 17.4 pts
2000 Republican 10,020 17,163 36.9% 26.3 pts
2002 Democratic 14,643 0 100.0% 100.0 pts
2004 Democratic 21,660 0 100.0% 100.0 pts
2006 Democratic 13,975 6,955 66.8% 33.5 pts
2008 Democratic 20,499 0 100.0% 100.0 pts
2010 Democratic 13,804 10,300 57.3% 14.5 pts
2012 Democratic 15,650 12,262 56.1% 12.1 pts
2014 Democratic 13,633 10,224 57.1% 14.3 pts
2016 Democratic 25,003 0 100.0% 100.0 pts
2018 Democratic 16,582 14,231 53.8% 7.6 pts

Winning Margin Over Time

1972: Republican margin 37.1 pts 1974: Republican margin 39.5 pts 1976: Republican margin 10.1 pts 1978: Republican margin 13.8 pts 1980: Republican margin 0.3 pts 1982: Democratic margin 22.3 pts 1984: Democratic margin 25.4 pts 1986: Democratic margin 1.7 pts 1988: Republican margin 1.8 pts 1990: Republican margin 28.8 pts 1992: Republican margin 19.6 pts 1994: Democratic margin 3.1 pts 1996: Democratic margin 5.2 pts 1998: Republican margin 17.4 pts 2000: Republican margin 26.3 pts 2002: Democratic margin 100.0 pts 2004: Democratic margin 100.0 pts 2006: Democratic margin 33.5 pts 2008: Democratic margin 100.0 pts 2010: Democratic margin 14.5 pts 2012: Democratic margin 12.1 pts 2014: Democratic margin 14.3 pts 2016: Democratic margin 100.0 pts 2018: Democratic margin 7.6 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 Oregon House District 31 at the 2018 election?

Democratic held Oregon House District 31 at the 2018 general election, with a two-party margin of 7.6 points.

Which parties have held Oregon House District 31 since 1972?

Since 1972, Oregon House District 31 has been held by: Democratic, Republican.

What was the closest two-party race on record in Oregon House District 31?

The closest two-party margin on record for Oregon House District 31 was 1980, at just 0.3 percentage points.