2026 midterms · Colorado · November 3
Colorado’s 4th District race 2026
Who’s running for U.S. House in Colorado’s 4th District on November 3, 2026: Eileen Laubacher (D), Lauren Boebert (R, incumbent) and Douglas Mangeris (Libertarian). Now held by Lauren Boebert (R). Forecasters: Likely R (average of 7; range Toss-up to Solid R).
How to vote in Colorado: check your registration on Colorado’s election website · deadlines on Vote.gov for Colorado
Next to a Democrat in Congress, $ backing is their backing from the pro-Israel PACs we track, 2016–2026; $0 backing means none. Tap a name for each PAC by year, with FEC links.
| Race | Rating | Democrats | Republicans | Others on the ballot | Notes |
|---|---|---|---|---|---|
| Colorado 4 | Likely R Average of 7; Toss-up to Solid R Each forecaster for Colorado 4
|  Eileen Laubacher | Lauren Boebert (inc.) | Douglas Mangeris (Libertarian) |
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Questions and answers
Who is running for U.S. House in Colorado’s 4th District in 2026?
On the November 3, 2026 ballot: Eileen Laubacher (D), Lauren Boebert (R, incumbent) and Douglas Mangeris (Libertarian).
When is the 2026 election for U.S. House in Colorado’s 4th District?
Election Day is Tuesday, November 3, 2026.
Who is favored in the 2026 race for U.S. House in Colorado’s 4th District?
The nonpartisan forecasters we track rate it Likely R on average (7 forecasters; their ratings range from Toss-up to Solid R). These are their ratings, not our prediction.
How do I vote in Colorado?
Check your registration on Colorado’s election website and the registration deadlines on Vote.gov; both are linked on this page.
Where this comes from
Candidates as of October 9, 2026, from state election offices, news reports and Ballotpedia’s candidate lists; independent and minor-party candidates may not be complete. Ratings are the average of up to seven nonpartisan forecasters, read from the tables Wikipedia editors keep of them: how we average them and each forecaster’s own pages. Backing is contributions plus outside spending for a candidate by the pro-Israel PACs we track, from FEC filings (method). Results, on election night, only from AP or official sources. Found an error? Tell us.
Photos of members of Congress: official portraits (public domain). Other photos: Eileen Laubacher: U.S. Navy (photo of Eileen Laubacher), Public domain.