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Illinois House District 20 Election Results

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

Illinois House District 20 was held by Republican after the 2018 general election, a two-party margin of 100.0 points. This page covers every general election on record for this district from 1982 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
1982 Democratic 9,879 0 100.0% 100.0 pts
1984 Democratic 13,186 0 100.0% 100.0 pts
1986 Democratic 8,844 1,274 87.4% 74.8 pts
1988 Democratic 10,824 2,182 83.2% 66.5 pts
1990 Democratic 6,622 0 100.0% 100.0 pts
1992 Democratic 16,453 8,753 65.3% 30.6 pts
1994 Democratic 10,770 5,560 66.0% 31.9 pts
1996 Democratic 16,447 5,987 73.3% 46.6 pts
1998 Democratic 11,362 4,139 73.3% 46.6 pts
2000 Democratic 18,387 5,236 77.8% 55.7 pts
2002 Republican 16,323 18,906 46.3% 7.3 pts
2004 Republican 17,249 25,022 40.8% 18.4 pts
2006 Republican 11,930 18,206 39.6% 20.8 pts
2008 Republican 16,374 23,966 40.6% 18.8 pts
2010 Republican 0 23,210 0.0% 100.0 pts
2012 Republican 15,286 23,462 39.5% 21.1 pts
2014 Republican 11,354 18,879 37.5% 24.9 pts
2016 Republican 20,142 25,739 43.9% 12.2 pts
2018 Republican 0 1 0.0% 100.0 pts

Winning Margin Over Time

1982: Democratic margin 100.0 pts 1984: Democratic margin 100.0 pts 1986: Democratic margin 74.8 pts 1988: Democratic margin 66.5 pts 1990: Democratic margin 100.0 pts 1992: Democratic margin 30.6 pts 1994: Democratic margin 31.9 pts 1996: Democratic margin 46.6 pts 1998: Democratic margin 46.6 pts 2000: Democratic margin 55.7 pts 2002: Republican margin 7.3 pts 2004: Republican margin 18.4 pts 2006: Republican margin 20.8 pts 2008: Republican margin 18.8 pts 2010: Republican margin 100.0 pts 2012: Republican margin 21.1 pts 2014: Republican margin 24.9 pts 2016: Republican margin 12.2 pts 2018: Republican margin 100.0 pts 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 Illinois House District 20 at the 2018 election?

Republican held Illinois House District 20 at the 2018 general election, with a two-party margin of 100.0 points.

Which parties have held Illinois House District 20 since 1982?

Since 1982, Illinois House District 20 has been held by: Democratic, Republican.

What was the closest two-party race on record in Illinois House District 20?

The closest two-party margin on record for Illinois House District 20 was 2002, at just 7.3 percentage points.