Polymarket Republican Senate seats after the 2026 midterm elections odds
On Polymarket, the favourite is ≤47, at 39%. The market settles by Nov 3, 2026, and $2K traded in the last 24 hours. Each contract pays $1 if it is right, so 39¢ reads as a 39% chance. Kalshi lists it too, and we compare the two prices below.
Also on Kalshi: Kalshi's page
Polymarket odds on every outcome
Show 1 more outcome
| Outcome | Chance | Yes price | 24h volume | |
|---|---|---|---|---|
| 57+ | 1% | 1¢ | $888 | Trade |
Chance is each outcome's Yes price on Polymarket. A Yes contract at 39¢ pays $1 if that outcome wins.
Polymarket vs Kalshi on these questions
The same questions on both venues. When the prices differ, the cheaper side costs you less for the same payout.
Will the Republican Party hold exactly 54 Senate seats after the 2026 midterm elections?
| Venue | Yes | No | Fee | 24h volume | Liquidity | |
|---|---|---|---|---|---|---|
| Polymarket | 2¢cheapest to buy | 98¢ | 0.1¢ | $0 | $46K | Trade → |
| Kalshi | 4¢ | 96¢ | 0.2¢ | $6K | – | Trade → |
Will the Republican Party hold exactly 56 Senate seats after the 2026 midterm elections?
| Venue | Yes | No | Fee | 24h volume | Liquidity | |
|---|---|---|---|---|---|---|
| Polymarket | 1¢cheapest to buy | 99¢ | <0.1¢ | $78 | $44K | Trade → |
| Kalshi | 2¢ | 98¢ | 0.1¢ | $11K | – | Trade → |
How the odds have moved
Polymarket's own series for the outcome the headline prices, from where its history starts; one venue, not a blend.
How this market resolves
Polymarket's own settlement wording, in full. This, not the headline, decides who gets paid.
Show the full rules
This market will resolve according to the Republican Party’s seat count in the United States Senate as a result of the 2026 United States midterm election scheduled for November 3, 2026.
The seat count includes all regular and special Senate elections that determine representation in the upcoming 120th Congress and are scheduled to take place in November 2026 as of October 31, 2026. Runoffs for qualifying elections will determine attribution of the relevant seat, even if they take place after November 2026. Vacant seats for which no election or special election to fill the seat is scheduled to take place in November 2026 as of October 31, 2026 will be treated as held by the party affiliation of the most recent member to hold that seat.
For seats contested in the specified election, seats are attributed to the party under which the member was elected. If a member-elect changes party affiliation, or vacates their seat, between election day and the formal organization of Congress, the seat is attributed to the party under which the member was elected.
For seats not contested in the specified election, seats are attributed to the party that holds the seat as of the date of the election. If a current sitting member of the U.S. Senate who is not up for election changes party affiliation or vacates their seat after the date of the election, the seat is attributed to the party under which the member was affiliated at the time of the election.
Senate members elected as independents who formally caucus with, or, for newly elected members, who announce their intent to caucus with, the Republican party are included in the count. If the caucus decisions of members of the Senate elected as independents cannot be determined on the date of the election, this market may remain open until the earlier of (i) an announcement from the relevant members of their intents to caucus, or (ii) January 4th, 11:59 PM ET of the following calendar year. If no such announcement is made by January 4th, 11:59 PM ET of the following calendar year, the member will not count towards the seat count of any party.
The resolution sources for this market will be official information from relevant state electoral authorities, the United States Congress, and a consensus of credible reporting.
How to trade this market on Polymarket
- Check your state first. A few states restrict some contracts.
- Open a Polymarket account. Americans trade on Polymarket US. Our Polymarket review covers sign-up and payouts.
- Buy Yes or No at the price shown, 39¢ for ≤47 right now. Each contract pays $1 if you are right.
- Sell any time before it settles, or hold to the result. Polymarket's fees apply to each trade.
CoinStats may earn a commission on links to venues. Prices are indicative and may differ when you trade.
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Common questions
What are the Polymarket odds on Republican Senate seats after the 2026 midterm elections?
On Polymarket, the favourite is ≤47, at 39%. That is a market-implied probability, not a forecast, and it moves as traders buy and sell.
How does this market resolve?
By Polymarket's own settlement rules for this market. Two venues can word the same question differently and settle differently, so read them before you trade.
Is this question on Kalshi too?
Yes. Kalshi's page has its prices and rules. The 2 questions both venues price are compared above, each with its own side-by-side page.
Can I trade this market in my state?
In most states, yes, on Polymarket US. A few states have acted against some contracts. Check your state first.
How accurate are Polymarket odds?
Often more accurate than polls, though never certain. A price of 70% should lose three times in ten. How accurate prediction markets are has the research.
What does it cost to trade on Polymarket?
A taker fee on most markets, largest near 50¢, and some categories charge nothing. Polymarket's fees has the detail.