Which party will gain most seats in Russian Parliamentary Election?

Platform comparison

Market context

Russia’s September 2026 State Duma election is still expected to be dominated by United Russia, which is why the market’s 68% crowd-implied probability for the party gaining the most seats sits below the near-certainty suggested by several public projections. FOM’s late-July polling model put the governing parties on 69.3% of seats, with United Russia on 243 of 450, while PoliWave’s simulation gave United Russia a median 319 seats and a 100% chance of finishing first on seat count. [1][3]

That reading fits the historical pattern: the Kremlin-backed party has repeatedly been able to convert administrative advantage and fragmented opposition into a large seat share, so the relevant question is usually not whether it wins, but by how much it improves on the previous Duma composition. One cross-platform wrinkle is that some market models focus on “gaining seats” versus the current seat baseline, which can flatter smaller parties if United Russia’s starting point is already depressed by vacancies or coalition bookkeeping; that helps explain why prediction-market probabilities can look less lopsided than analyst consensus. [2][5][7]

Traders should watch for formal election scheduling, candidate registration, and any changes to district boundaries or party-list rules, because those are the main levers that can shift the seat calculation before voting. The contest is currently expected to be held over 18–20 September 2026, and the Central Election Commission had already registered United Russia’s federal list by late July, a sign that the procedural timetable is advancing on schedule. [8][11]

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page reviews Which party will gain most seats in Russian Parliamentary Election? across five venues. The live probability is the Polymarket mid-price, sourced directly from the on-chain Polygon order book; the comparison columns benchmark each venue on fee structure, KYC, settlement currency and payment rails. Every CTA routes to Best Prediction Markets, which mirrors the Polymarket order book at 0% fees.

Resolution & payout

Settlement runs on-chain. Polymarket's contract logic separates YES and NO shares as conditional tokens; at resolution the winning share lifts to $1.00 and the losing one to $0. The outcome input comes from the UMA Optimistic Oracle, which secures against bad resolution with a bond + dispute window.

Once finalised, the smart contract pays USDC to the holders' wallets within minutes — no withdrawal fees beyond Polygon network gas. Kalshi settles in USD via CFTC clearance, Betfair in account currency net of commission, Manifold in play-money mana with no cash-out.

FAQ

Is this market available outside the US?

Polymarket itself is geo-blocked in the US/UK/EU. Always check the legal status of prediction markets in your jurisdiction before trading.

How does resolution work?

Through the UMA Optimistic Oracle on Polygon: a proposer submits the outcome, a two-hour challenge window opens, and USDC payouts settle automatically once the result is final.

What's the difference between YES and NO shares?

A YES share pays $1.00 if the event happens, $0 otherwise. A NO share pays $1.00 if the event doesn't happen. The market price between 0¢ and 100¢ is the implied probability.

What does Polymarket cost to trade?

Polymarket itself charges 0% — the only cost is the Polygon network fee, typically under $0.01 per transaction. Off-chain venues like Kalshi or Betfair charge 2-7% commission.

How fast are USDC deposits?

Polygon credits deposits after 12 confirmations — usually under 30 seconds. Withdrawals follow the same path and land back in your wallet within minutes.