Which party will win the Senate in 2026? Odds
Republican Party
last 24h
Probability over time
Current standings
- 1Republican Party56%
- 2Democratic Party44%
- 3Party A—
- 4Party B—
- 5Party C—
- 6Party D—
- ·Others (3 outcomes)<1%
- Implied
- 55.5%
- American
- -125
- Decimal
- 1.80
Cross-market check
Polymarket
56%
Kalshi
57%
CONTROLS-2026-R
Spread: -1.5pp (Polymarket − Kalshi)
Kalshi comparison shown only for verified equivalent markets.
Resolution criteriasource: Polymarket
This market will resolve according to the party that controls the Senate following the 2026 U.S. Senate elections scheduled for November 3, 2026. Senate control is defined as having more than half of the voting Senate members, or half of the voting Senate members and the Vice Presidency. If the outcome of this election is ambiguous given the above rules, this market will remain open until the Majority Leader of the US Senate is selected following the 2026 US general election, at which point it will resolve to the party the majority leader is affiliated with at the time of their election to that position. If the elected majority leader does not caucus with any listed party this market will resolve “Other”. Determination of which party controls the Senate after the 2026 US Senate elections will be based on a consensus of credible reporting, or if there is ambiguity, final federal and/or state election authority certification or other final official determination of the 2026 election results.
Frequently asked questions
What are the odds of Which party will win the Senate in 2026?
Polymarket traders currently price this at 56% — roughly -125 in American odds. Prices update continuously as real money trades; this page refreshes every 10 minutes.
What does this market resolve on?
This market will resolve according to the party that controls the Senate following the 2026 U.S. Senate elections scheduled for November 3, 2026. Senate control is defined as having more than half of the voting Senate members, or half of the voting Senate members and the Vice Presidency.
Where do these odds come from?
These odds are live order-book prices from Polymarket, a regulated real-money prediction market. Prices reflect what traders are actually paying for outcome shares right now — not polls or pundit forecasts. We read them from Polymarket's public API and refresh every 10 minutes.
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