LA Mayoral Election: Who will advance to the 2nd round?

Platform comparison

Active sub-markets

Market context

Los Angeles will hold a mayoral election on 2 June 2026, with a runoff scheduled for 3 November if no candidate secures an outright majority. The market resolves to "1st Round Outright Winner" if any single candidate achieves over 50 per cent of the vote, otherwise it settles on whichever pair advances to the second round.

California's top-two primary system makes first-round majorities uncommon in mayoral races, particularly in large cities where candidate fields remain fragmented. Los Angeles has not produced a first-round winner since 2001, when James Hahn secured 53 per cent against a divided field of nine candidates. In 2005, 2009, 2013, and 2017, every mayoral contest proceeded to a runoff despite the incumbent or frontrunner holding substantial first-round leads. The 73 per cent crowd probability for a second round reflects this historical pattern, though it also accounts for the possibility of an unusually consolidated field or a dominant candidate emerging during the campaign period.

Key variables affecting the outcome include candidate announcements through early 2026, polling trends as the June election approaches, and turnout composition in what will be a non-presidential election year. Recent Los Angeles elections have seen turnout drop significantly in mayoral-only contests compared to presidential cycles, which can amplify the influence of organised constituencies and shift vote distribution. Traders should monitor candidate entry decisions, major endorsements, and any shifts in the field that might concentrate support around fewer figures—developments that could narrow the path to a first-round majority.

Methodology

We track LA Mayoral Election: Who will advance to the 2nd round? on the five venues with material liquidity for prediction markets. Live odds come from the Polymarket Polygon order book — the only source that ships real-time data under an open licence. For Kalshi, Betfair and Manifold we list platform attributes (fee, KYC, settlement, payment) instead of fabricated odds, because their APIs use non-comparable contract definitions.

Resolution & payout

Polymarket-based markets settle through the UMA Optimistic Oracle on Polygon. A proposer submits the outcome, a two-hour challenge window opens, and unchallenged proposals finalise the resolution. Payouts settle automatically in USDC the moment the result is final — no bookmaker, no delay.

Kalshi-based markets settle in USD via the CFTC-regulated clearinghouse. Betfair Exchange settles in GBP/EUR net of commission. Manifold is play-money and does not pay out real funds.

FAQ

Where can I trade this market with the lowest fees?

On Sport Prediction, which mirrors the Polymarket order book at 0% fees. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

Is this market available outside the US?

Sport Prediction is available in most jurisdictions where Polymarket isn't directly accessible. Polymarket itself is geo-blocked in the US/UK/EU. Always check local regulations.

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 does it cost to trade on Sport Prediction?

Zero. Sport Prediction routes every order to the live Polymarket order book; the only cost is the Polygon network fee, typically under $0.01 per transaction.

How reliable are the quoted odds?

The YES/NO percentages are the live mid-prices of the Polymarket order book. On deep markets they move every few seconds; on thinner ones you'll see short plateaus.