Colorado state elections in 2020 were held on Tuesday, November 3, 2020. The deadline to register and receive a ballot by mail in Colorado was October 26, 2020. Voters may register in person and vote or pick up a ballot at Voter Service Centers October 19 through 7 p.m. November 3, 2020. Colorado exclusively used a vote-by-mail system, although voters may choose to vote in person at Voter Service and Polling Centers (VSPCs).
In addition to the U.S. presidential race, Colorado voters voted in the U.S. Senate, U.S. House, state executive offices, State Senate, State House, state Supreme Court, Appellate courts, local judges, state ballot measures, and municipal elections.
Colorado has nine electoral votes in the Electoral College. Nominees for the presidential election included Donald Trump, Joe Biden, and Jo Jorgensen. Joe Biden won the popular vote with 55%, winning nine pledged electoral votes.
Incumbent Republican Senator Cory Gardner sought reelection against Democratic former governor John Hickenlooper in the general election. John Hickenlooper won the election with 54% of the popular vote, making it a gain for the Democratic Party from the Republican Party.
Coloradans voted for seven U.S. Representatives, one from each of the state's seven congressional districts. No seats changed hands, the Democrats winning four seats and the Republicans winning three seats.
Six state executive offices were up for election in Colorado: three seats for the State board of education, and three seats for the State board of regents.
The Colorado State Senate had 18 seats out of 35 that were up for election in the general election. The Democratic Party retained control of the Senate, gaining the 27th Senate district from the Republican Party, strengthening their majority by one seat.
The Colorado House had all 65 seats up for election in the general election. The Democratic Party retained control of the House, gaining the 38th district from the Republican Party while losing the 47th district to the Republicans, resulting in no net seat change. The resulting composition was 41 Democrats and 24 Republicans.
There were two judges whose terms expired on January 11, 2021, and their seats were up for retention election in the general election. These judges were Melissa Hart and Carlos Armando Samour Jr. Both were retained as judges.
There were two Colorado Court of Appeals justices whose terms expired on January 11, 2021, and their seats were up for retention election in the general election. These judges were Craig Welling and Ted C. Tow. Both were retained as justices.
Amendments C and 76 require 55% of voters to pass, as they add to the Colorado Constitution.
Amendment B<br />
Proposition 113<br />
Proposition 114<br />
Proposition 115<br />
Proposition 116<br />
Proposition 118<br />