Will United Russia win between 325 and 339 seats in the next Russian State Duma election?

Crossbook compares what two exchanges, Polymarket and Kalshi, charge for the same event, and publishes a permanent scored record of its own forecasts under published rules.

Tracked on one venue, with Crossbook's own call on the record.

TradingContract settles 20 Sept 2026Last checked 16 Sept 2026, 15:20 UTC

Bid/ask midpoint · retrieved 2026-09-16T15:20:28.917Z. Venue quote-update time is unavailable. Readings can be asynchronous.

41.0%bid 40.0% / ask 42.0%24h volume $2K · liquidity $53Kas of 16 Sept, 15:20 UTCView on Polymarket

Crossbook forecast

27.0%against a market price of 43.0% at the timeOpen
Logged 15 Sept 2026, 20:52 UTC
- Official Russian election results under the current system are effectively managed to deliver United Russia a constitutional supermajority (300+ of 450), so the outcome is concentrated in the 300-360 band rather than distributed like a competitive election, making the class base rate of ~20% per bracket a reasonable anchor.
- United Russia entered the election with exactly 324 seats, and managed systems typically engineer a result at or slightly above the prior baseline to signal stability; a 325-339 outcome represents precisely that modest-gain scenario, which is the single most plausible narrative for how the authorities would script the result.
- Against that, authorities have historically also delivered larger supermajorities (343 in 2016) or, in weaker cycles, counts near or below 324 (238 in 2011); there is no retrieved evidence about 2026 targets, turnout management, or the systemic opposition's allocation, so the adjustment above base rate should be modest.
- Timing is not a material risk factor: voting runs Sept 18-20, 2026 with final results required by Oct 5, 2026, well before the May 31, 2027 resolution backstop, so the market will almost certainly resolve on actual announced results rather than defaulting to the lowest bracket.
- Signal vs narrative: the 324-seat incumbency and 450-seat chamber are hard structural signal; the 'authorities prefer a modest gain' logic is narrative and is why confidence is only medium.
What would change it: Credible reporting before results are announced that the authorities are targeting a materially different seat count for United Russia (e.g., a 2016-style 340+ landslide or a deliberate reduction below 325) would move this estimate substantially.

Context

Polymarket prices this at 41.0%. No verified equivalent is currently listed on the other venue, so there is no cross venue comparison on this page.

Volume over the last 24 hours is thin, at about $1,855 on the busier venue. It closes in 3 days. Prices this close to resolution move on news rather than on reassessment.

Related markets

Crossbook publishes every forecast it makes, timestamped before the answer is known and scored against the market afterwards. See the public record and the rules it is held to.