| Election Name: | 2018 Colorado House of Representatives election |
| Country: | Colorado |
| Type: | legislative |
| Ongoing: | no |
| Previous Election: | 2016 Colorado House of Representatives election |
| Previous Year: | 2016 |
| Next Election: | 2020 Colorado House of Representatives election |
| Next Year: | 2020 |
| Seats For Election: | All 65 seats in the Colorado House of Representatives |
| Majority Seats: | 33 |
| Election Date: | November 6, 2018 |
| Leader1: | Crisanta Duran (term-limited) |
| Party1: | Colorado Democratic Party |
| Leaders Seat1: | 5th |
| Last Election1: | 37 |
| Seats Before1: | 36 |
| Seats1: | 41 |
| Seat Change1: | 5 |
| Popular Vote1: | 1,321,710 |
| Percentage1: | 54.80% |
| Swing1: | 6.97% |
| Leader2: | Patrick Neville |
| Party2: | Colorado Republican Party |
| Leaders Seat2: | 45th |
| Last Election2: | 28 |
| Seats Before2: | 29 |
| Seats2: | 24 |
| Seat Change2: | 5 |
| Popular Vote2: | 1,025,765 |
| Percentage2: | 42.53% |
| Swing2: | 6.74% |
| Map Size: | 450px |
| Speaker of the House | |
| Before Election: | Crisanta Duran |
| Before Party: | Democratic |
| After Election: | KC Becker |
| After Party: | Democratic |
The 2018 Colorado House of Representatives elections took place as part of the biennial United States elections. Colorado voters elected state representatives in all 65 of the state house's districts. State representatives serve two-year terms in the Colorado House of Representatives. The Colorado Reapportionment Commission provides a statewide map of the state House here, and individual district maps are available from the U.S. Census here.
A primary election on June 26, 2018, determined which candidates appear on the November 6 general election ballot. Primary election results can be obtained from the Colorado Secretary of State's website.[1]
Following the 2016 state House elections, Democrats maintained effective control of the House with 37 members. However, on March 2, 2018, immediately before being expelled from the legislature in the face of sexual harassment allegations, State Representative Steve Lebsock switched parties to Republican. This forced his replacement to be a fellow Republican.[2] Due to these acts, Republican seats increased from 28 to 29 (Republican Alex Winkler was seated on March 23, 2018, to represent District 34) and Democratic seats decreased from 37 to 36 by election day 2018.
On election day, Democrats expanded their majority by 5 seats, as the party also swept all statewide elections in the state. To claim control of the chamber from Democrats, the Republicans would have needed to net 4 House seats.
| Colorado House of Representatives election, 2018 General election — November 6, 2018 | |||||||
|---|---|---|---|---|---|---|---|
| Party | Votes | Percentage | Seats | +/– | Seatscontesting | ||
| Democratic | 1,321,710 | 54.80% | 41 | 5 | 64 | ||
| Republican | 1,025,765 | 42.53% | 24 | 5 | 58 | ||
| Independent | 46,447 | 1.93% | 0 | 6 | |||
| Libertarian | 17,153 | 0.71% | 0 | 12 | |||
| Unity | 874 | 0.04% | 0 | 1 | |||
| Total | 2,411,949 | 100.0% | 65 | − | − | ||
Five Democratic incumbents are term-limited and prohibited from seeking a fifth term.
Seats where the margin of victory was under 10%:
| align=center | District 1 • District 2 • District 3 • District 4 • District 5 • District 6 • District 7 • District 8 • District 9 • District 10 • District 11 • District 12 • District 13 • District 14 • District 15 • District 16 • District 17 • District 18 • District 19 • District 20 • District 21 • District 22 • District 23 • District 24 • District 25 • District 26 • District 27 • District 28 • District 29 • District 30 • District 31 • District 32 • District 33 • District 34 • District 35 • District 36 • District 37 • District 38 • District 39 • District 40 • District 41 • District 42 • District 43 • District 44 • District 45 • District 46 • District 47 • District 48 • District 49 • District 50 • District 51 • District 52 • District 53 • District 54 • District 55 • District 56 • District 57 • District 58 • District 59 • District 60 • District 61 • District 62 • District 63 • District 64 • District 65 |