Colorado US Senate 2026
Election day is November 3, 2026. A statewide contest in Colorado.
Who is favoured in Colorado US Senate?
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What the Colorado US Senate election decides
The Senate confirms federal judges and cabinet officers, ratifies treaties, and can stop legislation the House passes. With a six-year term and a hundred-member chamber, a single seat is a larger share of the institution than any House district, which is why Senate races draw national money into state contests.
Each state sends two senators regardless of population, so this seat carries the same weight as California's or Wyoming's. Colorado voters fill it alongside all 8 of the state's House seats and the governorship, and a Senate term runs six years, spanning two future Congresses and, in this case, the next presidential election.
How Colorado votes
Colorado blends a booming Front Range corridor from Denver to Fort Collins with ranching and energy country on the plains and Western Slope. It has trended Democratic statewide while retaining a strong independent registration and an outdoors-and-growth politics of its own. That backdrop is the ground any Colorado campaign fights on, and it is what the Electorate HQ simulation reads first when it weighs a ticket's platform against this contest.
About this race
The 2026 United States Senate election in Colorado was held on November 3, 2026, to elect a member of the United States Senate to represent the state of Colorado. Democratic incumbent John Hickenlooper was re-elected a second term, defeating Republican state senator Mark Baisley.
Primary elections were held on June 30. In the Democratic primary, Hickenlooper won the nomination with 52.8% of the vote over state senator Julie Gonzales. Baisley was the only candidate to receive at least 30% support from the Republican State Assembly, allowing him to advance to the primary unopposed.
Background
Latest coverage of the Colorado US Senate race
Voter guide for Colorado’s US Senate midterm electionColorado 2026 Election ResultsElection Day is Nov. 3. Here’s what you need to know about Colorado’s candidates, ballot measures and how to vote.Colorado Democratic U.S. Sen. John Hickenlooper wins reelectionHickenlooper Wins Colorado Senate Race by Wide MarginHere's who's running for the US Senate in ColoradoColorado U.S. Senate Election 2026: Latest PollsThe rest of the Colorado ballot
Every Colorado House district, the counties inside each one, and an address lookup that resolves your exact districts are on the Colorado state page.
Other 2026 races in Colorado
Analysis covering Colorado
One seat covers 34 square kilometres. One seat covers 1,713,379.
New York's 12th and Alaska's at-large seat each elect one member of the House. On the ground, one is fifty thousand times the size of the other.
Twenty-six states elect a senator and a governor on the same day in 2026
The overlap between the Senate class and the gubernatorial cohort is a coincidence of two unrelated calendars, and it decides where money goes.