Polymarket is the largest crypto-based prediction market, and its political section is where much of its reputation was built. During the 2024 US presidential race it processed record volumes, and its prices were quoted alongside polls in mainstream coverage. The appeal is simple: instead of asking people what they intend to do, a prediction market asks them to back what they think will happen, and the resulting price reads as a live probability.
Right now the deepest live political coverage on the platform is the 2026 US midterms, with contracts on control of the House, control of the Senate, the overall balance of power, the number of Republican governors, and hundreds of individual races. Beyond the US, coverage is scattered across a handful of international contests, including the next prime ministers of Ethiopia and Israel and the next French and Brazilian presidential races. Coverage of any country comes and goes with the electoral calendar, so the live catalogue leans heavily toward whichever major election is closest.
This guide explains how those political markets are put together, using the live midterm contracts as worked examples. For the platform mechanics in full first, our companion piece on how Polymarket works covers the base layer.
How the markets are structured
Political markets on Polymarket come in a few shapes, and the midterms show all of them.
The simplest is a binary market: one question, two shares, Yes and No, priced from 0 to 100 cents and adding to a dollar. The House control market is really a pair of these, with Democratic control trading around 83 or 84 cents and Republican control around 16 or 17 cents as of early July 2026. The Senate control market runs the other way, with Republican control near 56 or 57 cents and Democratic control near 44 or 45. Read together, the two prices say the crowd currently expects a split Congress.
The second shape is a multi-outcome market, where several mutually exclusive results each get their own price and the whole set adds to roughly a dollar. The Balance of Power market is the clean example: Democrats sweeping both chambers sits near 42 or 43 cents, a Republican Senate with a Democratic House near 39 or 40, a Republican sweep near 15 or 16, and the remaining combinations in the low single digits.
The third shape is a bracketed ladder, where the outcomes are numeric bands. The market on how many Republican governors there will be after the midterms prices bands like 24 to 25 (leading near 44 cents), 22 to 23 (near 25 or 26), 26 to 27 (near 16 or 17), and fewer than 22 (near 10). If you have read our coverage of box-office ladders, the mechanic is identical, only the subject changes.
Fees and funding
Fees are worth getting right, because the honest answer is not zero. Polymarket charges a taker fee across most retail categories, and politics is one of them, currently a taker fee with a partial maker rebate. Makers, the traders who post resting orders, pay nothing. Only the fee-free exception categories, geopolitics and world events, escape the taker fee entirely, and political markets do not sit in that exception. In practice, for most retail-sized positions the bigger cost is not the fee at all but the bid-ask spread and the depth of the book, especially on thinly traded individual races.
Funding is via crypto rails rather than a bank transfer, which is the single biggest practical hurdle for newcomers. Our step-by-step guide to funding a Polymarket account with USDC walks through the deposit path, and our explainer on why prediction markets run on crypto rails covers why the platform is built this way.
How resolution works
Every political market has a defined resolution source and a defined resolution date. The midterm control markets, for example, resolve to the certified result once the new Congress is settled, with a scheduled date tied to the November election. Settlement itself runs through UMA's optimistic oracle. A proposed outcome is posted, and if nobody disputes it within a challenge window, it stands and the market pays out. If someone disputes, the question escalates to a token-holder vote before it finalises. The practical takeaway for a trader is that resolution is not instant on election night. It waits for the reported and certified result, and the contract terms, not the television call, decide the payout. Read the resolution clause on any political market before you trade it, because the edge cases, recounts, contested certifications, delayed races, are exactly where a loosely worded contract causes arguments.
Prediction markets versus polling
The reason these markets draw attention every cycle is that they offer a different signal from polls. A poll measures stated intention within a sampled group and carries a margin of error. A market price aggregates the money-weighted beliefs of everyone willing to trade and updates continuously. Neither is a crystal ball. Markets can be thin, they can be moved by a single large trader, and they inherit whatever information the crowd is working from, polls included. The useful way to read a political market is as one more instrument on the dashboard, a consensus price to compare against the polling average, not a replacement for it.
How to take part
The practical route is short. Fund an account, find a market, and buy the Yes or No share that matches your view, or post a limit order and wait. The two cross-links above cover funding in detail. On access, Polymarket has a regulated US path now, and US-based readers should check whether their state or account status permits use of the platform. Details on Polymarket's regulated US access are covered in our companion piece on how it works after the QCEX. Outside the US, access rules vary by jurisdiction, so the same check applies.
The editorial take
Polymarket political markets are good at one thing in particular: producing a continuously updating, money-backed probability for a well-defined outcome, which is genuinely useful for the big questions like chamber control. They are less good on thin, niche contracts, where a few hundred dollars of volume can leave a wide spread and a jumpy price that says more about liquidity than about the race. Treat the deep, high-volume markets as real signal and the thin ones as interesting but noisy.
Frequently asked questions
Does Polymarket charge fees on political markets?
Yes. Political markets fall under Polymarket's standard retail fee categories rather than the fee-free geopolitics and world-events exception, so takers pay a fee. Makers who post resting orders are not charged and receive a partial rebate. For most retail-sized trades the larger real cost is the bid-ask spread and order-book depth, particularly on thin individual races, rather than the fee itself.
How do Polymarket election markets resolve?
Each market resolves to a defined source, usually the certified official result, on or after the relevant election date, with settlement run through UMA's optimistic oracle: a proposed result is posted, and if it is not disputed within the challenge window it finalises and pays out, while disputed questions escalate to a token-holder vote. Because resolution waits for the certified outcome rather than a media projection, payout can come days after election night.
What is the difference between a control market and a balance-of-power market?
A control market is a binary question on a single chamber, for example whether Democrats or Republicans win the House. A balance-of-power market prices each combination across both chambers at once, such as a Democratic sweep, a split Congress, or a Republican sweep. The binary markets are easier to read in isolation, while the balance-of-power market shows how the crowd weighs the joint outcome.