NYC Mayor Odds: What Kalshi and Polymarket Are Pricing

Update — August 15, 2026. Reviewed as of this date. The political contracts discussed below remain listed on [Kalshi](=AFF:kalshi) and [Polymarket](=AFF:polymarket); the widget above carries the live price. Polling figures cited in this piece are quoted verbatim from the pollster's own release and are not re-estimated by us.

If you want to know who's actually winning the New York City mayoral race, polls are now the slow-moving indicator. Prediction markets are the fast one — and on Polymarket and Kalshi, the New York City mayor contracts have moved from a wide spring 2025 field to a near-resolved general election in under twelve months.

Update — July 2, 2026. The active forward market on this page is now Polymarket's "Zohran Mamdani out as mayor of NYC before 2027" contract, currently trading in the single digits — i.e., the market is pricing roughly a 95%+ chance he serves out the year. The longer-dated 2029 reelection contract is the one moving with budget-vote headlines. Live prices in the widget above.

Who's the favorite right now

Zohran Mamdani is the heavy favorite on the headline NYC-mayor general-election contract. Polymarket's main market resolved his Democratic primary at roughly 100% on June 24, 2025, and the general election has carried that signal forward — albeit with more daylight than the primary did, because Andrew Cuomo's independent line and Eric Adams's positioning create real, if narrow, paths.

Kalshi's regulated event contracts on the race tell the same story with thinner liquidity. The two platforms agree on the shape: one heavy favorite, two long shots with name recognition, and a long tail.

How the market got here

Reading the market chronologically explains it best. In April 2025 the Democratic primary contract was a wide field — Cuomo, Mamdani, Brad Lander, Adrienne Adams, and a half-dozen others, all pricing in the single digits to low teens. By early June, Mamdani had broken away. By primary night, the headline contract closed near 100%. Total volume across NYC mayor markets on Polymarket cleared $50 million.

That's the part worth keeping. The market called it earlier than the published polling did, and at a finer resolution. The general election market has inherited that credibility.

Where to follow live odds

• —Polymarket — deepest liquidity on the headline general-election contract; iOS app only for US users (promo code NYPREDICTS for a $50 trading bonus).
• —Kalshi — federally regulated event contracts on the same race, available in all 50 states (promo code NYPREDICTS for $10).

What to watch next

• —Mamdani's margin contracts — the prices on +5 / +10 / +15 victory bands move every news cycle.
• —Cuomo's independent ballot line — the cleanest binary contract on the page.
• —Adams's positioning — turnout assumptions matter more here than anywhere else on the slate.
• —Downballot races (Comptroller, Public Advocate) — they shape what a Mamdani administration can actually do.

The honest version

These are not predictions of the future. They're a price on collective opinion right now, and they reprice in real time. The smart way to use NYC-mayor odds is as a sentiment dashboard — watch the relative movement, not the absolute number, and don't read a 4-point swing on a slow news day as anything more than noise.

Editorial only — none of this is a recommendation to trade. Confirm eligibility on each platform before depositing. For the broader picture see our NY legality guide.