2026 Colorado · U.S. House
CO-04 House race odds
As of Oct 3, 2026, prediction markets give Republican Lauren Boebert a 70% chance of winning the 2026 race for CO-04 over Democrat Eileen Laubacher (Kalshi 70%, Polymarket 70%).
Updated · prices refresh every 10 minutes
- Market rating
- Lean R
- Kalshi (D / R)
- 29.9% / 70.1%
- Polymarket (D / R)
- 29.8% / 70.2%
- Gap between exchanges
- 0.1 pts
- Election Day
- Nov 3, 2026 (32 days)
Price history
Democratic odds fell 7.1 points over the past 3 months, from 37% to 30%.
Every candidate, by exchange
Each exchange's prices rescaled to add up to 100%. Kalshi prices are the bid–ask midpoint; Polymarket prices are its displayed price.
Kalshi open market ↗
| Outcome | Chance | Volume |
|---|---|---|
| Lauren Boebert (R) | 70.1% | $25K |
| Eileen Laubacher (D) | 29.9% | $42K |
Polymarket open market ↗
| Outcome | Chance | Volume |
|---|---|---|
| Lauren Boebert (R) | 70.2% | $26K |
| Eileen Laubacher (D) | 29.8% | $15K |
Questions about this race
Who is favored to win the 2026 CO-04 House race?
As of Oct 3, 2026, prediction markets give Republican Lauren Boebert a 70% chance of winning the 2026 race for CO-04 over Democrat Eileen Laubacher (Kalshi 70%, Polymarket 70%).
What do Kalshi and Polymarket say?
Kalshi: Democrats 30%, Republicans 70%. Polymarket: Democrats 30%, Republicans 70%. The two exchanges differ by 0.1 points.
How have the odds moved this week?
Democratic odds are essentially unchanged since Sep 26, 2026.
When is the 2026 election?
Election Day is Nov 3, 2026, 32 days from now.
Other Colorado races in 2026
- Colorado GovernorD 98%
- CO-01 HouseD 98%
- CO-02 HouseD 98%
- CO-03 HouseR 74%
- CO-05 HouseR 72%
- CO-06 HouseD 97%
- CO-07 HouseD 96%
- CO-08 HouseD 85%
- Colorado SenateD 99%
Closest House races in 2026
Data
Price history (JSON)All 2026 races (JSON)All 2026 races (CSV)2026 dashboardMethodology
Cite as: Parlay the People, “2026 CO-04 House race,” https://parlaythepeople.com/2026/house/co-4/, accessed Oct 3, 2026. Prediction-market prices are crowd forecasts, not certainties, and nothing here is betting or investment advice.