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Politics·Senate

Which party will win the Senate in 2026?

Polymarket
SepOctNovDecJanFebMarAprMayJunJulAugSepOct20%35%50%65%80%
Source: polymarket.foo
Democratic Party68%
Republican Party33%

$10,897,691 Vol.

Recent polling averages and forecasts show Democrats leading or competitive in multiple Republican-held battlegrounds, including Texas, Michigan, Maine, Kansas, Iowa, Alaska, and Ohio, creating several paths to the net gains needed for majority control. A Democratic generic ballot advantage of roughly eight points aligns with historical midterm patterns favoring the opposition party. These dynamics have produced a trader consensus reflected in the 67.5% implied probability for Democrats, as models project seat outcomes ranging from 49 to 56 for their caucus. Late-cycle surveys continue to highlight tight margins in key contests, underscoring the role of turnout and polling error in the final days before November 3.

Additional context

Updated Aug 10

This market's rules have been updated for clarity.

Volume
$10,897,691
End Date
Nov 3, 2026
Market Opened
Jul 11, 2025, 3:47 PM ET

Resolver

0x2f5e3684c...

Beware of external links.

Mission3
Mission3
free money
biktornq
free money on democrats
paddaa
paddaa
everything is a 50/50 because it either happens or it doesn't
Skyb0y
Democrats are slight favorites but the Republicans have to be a good stake for what is very close to a coin flip.
Tridelo
Surely the Libertarian Party got this in the bag
CryptoBankrupt
CryptoBankrupt
Thank you to Trump and the Republicans for the CLARITY Act! It takes real skill to fail to pass a bill when you have a majority! Or was that not the goal?
Crypto Down Bad GIF by ZTIKIX
InsderEpstien
BTW guys bots are being used to manipulate the odds with money it will cost them quite a lot of money
singularity.
Americans, Don't let this red-haired bastard rule you for another year.
hotdreamer
Ok and? Open borders it's great so stfu

Frequently Asked Questions

"Which party will win the Senate in 2026?" is a prediction market on Polymarket with 2 possible outcomes where traders buy and sell shares based on what they believe will happen. The current leading outcome is "Democratic Party" at 68%, followed by "Republican Party" at 33%. Prices reflect real-time crowd-sourced probabilities. For example, a share priced at 68¢ implies that the market collectively assigns a 68% chance to that outcome. These odds shift continuously as traders react to new developments and information. Shares in the correct outcome are redeemable for $1 each upon market resolution.

As of today, "Which party will win the Senate in 2026?" has generated $10.9 million in total trading volume since the market launched on Jul 11, 2025. This level of trading activity reflects strong engagement from the Polymarket community and helps ensure that the current odds are informed by a deep pool of market participants. You can track live price movements and trade on any outcome directly on this page.

To trade on "Which party will win the Senate in 2026?," browse the 2 available outcomes listed on this page. Each outcome displays a current price representing the market's implied probability. To take a position, select the outcome you believe is most likely, choose "Yes" to trade in favor of it or "No" to trade against it, enter your amount, and click "Trade." If your chosen outcome is correct when the market resolves, your "Yes" shares pay out $1 each. If it's incorrect, they pay out $0. You can also sell your shares at any time before resolution if you want to lock in a profit or cut a loss.

The current frontrunner for "Which party will win the Senate in 2026?" is "Democratic Party" at 68%, meaning the market assigns a 68% chance to that outcome. The next closest outcome is "Republican Party" at 33%. These odds update in real-time as traders buy and sell shares, so they reflect the latest collective view of what's most likely to happen. Check back frequently or bookmark this page to follow how the odds shift as new information emerges.

The resolution rules for "Which party will win the Senate in 2026?" define exactly what needs to happen for each outcome to be declared a winner — including the official data sources used to determine the result. You can review the complete resolution criteria in the "Rules" section on this page above the comments. We recommend reading the rules carefully before trading, as they specify the precise conditions, edge cases, and sources that govern how this market is settled.
icon for Which party will win the Senate in 2026?
Which party will win the Senate in 2026?Democratic Party·Yes

Amount

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