CO-04 House 2026

The chance this seat goes Republican in November, across every listed contract, as a 0–100 chance the Republican wins.

LiveHeld by Republicans · projected hold·$5K traded / 24h·10 contracts·5 exchanges·Margin rank 24 of 435
SEAT PMI · 0–100 · CHANCE REPUBLICANS WIN
66.5Lean R · ▼ 5.5 14d
DEMOCRATEVENREPUBLICAN
Republicans win
66.5
enters as 66.5
Democrats win
33.5
enters as 100 − 33.5 = 66.5

Both legs are aggregated. The Democratic leg is converted as 100 − p, so this seat reads on the same scale as every other.

Control of the House

Does CO-04 decide the House?

No single seat does on today’s prices.
CO-04 is one of the 37 contested seats. Democrats already have 226 seats rated safe or likely, 8 past the 218 majority; Republicans have 172 rated safe or likely, 46 short of 218.
Full House picture
Contracts behind this reading · 6 of 10

Sorted by weight

Will Democratic win the House race for CO-04? - Eileen Laubacher32.0Kalshi ↗ · Democratic leg · enters as 68.0weight 31.4%Will Republican win the House race for CO-04? - Lauren Boebert68.0Kalshi ↗ · Republican leg · enters as 68.0weight 31.1%Will the Democratic Party win the CO-04 House seat?34.0Polymarket ↗ · Democratic leg · enters as 66.0weight 22.2%Will the Republican Party win the CO-04 House seat?65.5Polymarket ↗ · Republican leg · enters as 65.5weight 15.3%Colorado-04 House Winner - Eileen Laubacher33.0Gemini ↗ · Republican leg · enters as 33.0weight 0.0%Colorado-04 House Winner - Lauren Boebert71.0Gemini ↗ · Republican leg · enters as 71.0weight 0.0%
Show all 10 contracts
Weights are 24h liquidity share · reconciled reading 66.5 · rows open on the exchange
Other Colorado races this cycle

Also on the ballot