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Will the Democrats win the Ohio Senate race in 2026?

59.4%
Consensus Probability (Model B — Geometric Mean of Odds)
2 platforms · 2pp spread · $37K

Across 2 prediction market platforms, "Will the Democrats win the Ohio Senate race in 2026?" has a consensus probability of 59.4%. Polymarket: 60.5%, Manifold: 58.2%. Consensus via geometric mean of odds (Satopaa et al., 2014), validated by IARPA ACE tournament.

Platform Comparison — white line = consensus
Polymarket
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60%
$37K
Manifold
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58%
12 traders
Probability Over Time
All 6 Consensus Models
Market Details
Polymarket
Updated 2h ago
Volume
$37K
Liquidity
$34K
Bid / Ask
60.0% / 61.0%
Spread
1.0%
Opened
Apr 2026
Resolves
This market will resolve according to the winner of the 2026 Ohio U.S. Senate special election currently scheduled for November 3, inclusive of any run-offs. A candidate shall be considered to represent a party in the event that he or she is the nominee of the party in question.…
Manifold
Updated 2h ago
Volume
Liquidity
Bid / Ask
— / —
Spread
Opened
Apr 2026
Resolves
Nov 2026

About This Consensus

Computed from 2 platforms using geometric mean of odds (Satopaa et al., 2014). This method was validated by the IARPA ACE forecasting tournament as the most accurate probability aggregation technique. Full methodology →

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