New York City Mayoral Election: Polymarket Odds Analysis 2025

The New York City Mayoral race is coming up fast, and if you’re into politics, prediction markets, or you just like seeing how crowds bet on major events, you’ve probably checked out Polymarket. This is one of the biggest political prediction markets out there, and right now it’s absolutely buzzing with more than $361 million in volume.

Let’s dig in and see what the numbers look like, which names are leading the pack, and what all this means if you like to trade, follow odds, or just want to sound smart at your next dinner party!

The Numbers – Who’s Hot, Who’s Not

Imagine a giant online market where people trade on who they think will be NYC’s next mayor.

Here’s how things are shaping up today:

NYC Mayoral Race: Win Odds & Trading Volume

Candidate Performance Breakdown

As I dive into the NYC mayoral race on Polymarket, I like to look past just the odds and really see how each major candidate stacks up digging into their performance, polling, and trading activity. Here’s my data-driven breakdown to help make sense of what’s really going on in the market.

By The Numbers: Polymarket Odds, Volume, Polls, and Primaries

NYC 2025 Mayoral Race — Polymarket Odds & Key Metrics

Here’s how I break down the key stats:

Polymarket Odds: This shows what the market thinks basically, the percentage chance each candidate has of winning the mayor’s race. Right now, Zohran Mamdani is absolutely dominating, trading around 94%.

Volume Traded: This tells us how much real money people are putting on the line. The higher the volume, the more confidence (and liquidity) there is in the market. What’s interesting is that Curtis Sliwa has a surprisingly large trading volume even with near-zero odds, probably from traders hedging or playing short-term volatility.

Poll Margin: This measures how much support each candidate has in the latest polls compared to their top rivals. Mamdani’s leading by about 14 points in recent surveys, which lines up pretty closely with what we’re seeing in the markets.

Primary Results: This one’s straight forward, it’s the share of votes each candidate pulled in during the primary. Mamdani came out on top with 56%, while Andrew Cuomo gave a solid challenge at 44% but couldn’t quite catch up. Eric Adams bowed out early after losing traction.

Historical Result: This gives some context from past races. Sliwa lost to Adams back in 2021, while Mamdani and Cuomo weren’t in that contest. Adams, for his part, only narrowly won that year, a reminder of how fast the political tide can shift.

Here’s how I see it, my key takeaways for traders and readers watching this race:

Why Mamdani’s Odds Are So High: Mamdani’s riding a massive progressive wave right now. Between strong early turnout (reportedly five times higher than the last cycle), a dominant primary win, and a message that’s clearly connecting with voters, it’s no surprise the market’s going all-in on him.

Cuomo’s “Spoiler” Factor: Even though Cuomo’s odds look small, his trading volume says otherwise. There’s a lot of action around him, probably from traders betting that he could split the vote or gain late momentum if things start to shift.

Volatility Around Sliwa: Curtis Sliwa’s odds are tiny, but the volume is big, which usually means traders are playing the volatility game. These could be upset bets or just smart hedges by bigger players trying to balance exposure.

Incumbent Fade for Adams: Eric Adams’ story is a classic case of how fast the market can turn. He went from favorite to fully out, and both his odds and volume collapsed after his withdrawal. It’s a good reminder for bettors not to lean too heavily on incumbency alone, momentum can flip fast in this game.

How To Use This Table?

If you’re trying to handicap the race or just want to make smart bets, this table and breakdown gives you the real-world context to go beyond just price. Look for candidates with heavy volume but swings in odds, that’s where big moves (and risk!) happen, especially as election day approaches.

Market Trends & Volatility Analysis

If you really want to stay ahead in this race, it’s all about watching how the Polymarket odds and trading activity shift over time. I like to track the volatility, momentum, and “real-time sentiment” those subtle moves that reveal when the crowd’s emotions are actually driving the market.

Breaking it down this way helps me spot potential arbitrage opportunities and know exactly when the smart money (or the hype) is taking over.

Odds Movement Over Time: Mamdani vs. Cuomo

Monthly Trading & Odds — Mamdani vs. Cuomo

Mini Line Chart Suggestion

• Plot the above odds for Mamdani and Cuomo over months.
• Show daily contract volume as a bar backdrop for each point.

Spotting Volume Spikes

Major volume spikes happened after key news events:

• June: Mamdani won key endorsement (odds soared to 99%, 25% jump in daily contracts)
• August: Cuomo’s 38% vote share rumor (Cuomo’s volume doubled, odds up to 10%)
• October 28: Post-debate analysis (Mamdani’s volume up 20%, odds tight at 91–94%)

Implied Probability Vs. Poll Data

Mamdani Implied Probability vs. Poll Lead

Markets are consistently pricing Mamdani more aggressively than traditional polls, with a 70–80 point spread in implied probability over poll leads.

Contracts Traded Per Day

• Average: 20,000 contracts daily (last 90 days)
• Peak Days: Up to 27,000 contracts (major news or end-of-month updates)
• Low Days: Under 12,000 contracts (market lulls, weekends)

Trader’s Takeaways

• Momentum matters: Odds react sharply to endorsement news, debate performance, and early voting stats.
• Volume signals: Watch for big spikes before making bets, these often predict new trends, especially after rumors or surprise news.
• Polls vs. Market: When market odds run hot compared to poll numbers, big money may be betting on turnout or last-minute swings.
• Timing counts: The best trading windows often open right after these volume surges.

Polymarket Pulse: What Bettors Are Saying

Zohran Mamdani’s “Yes” shares are trading at a blazing 94%, that’s 94 cents a pop, with over $106 million moving on his bet alone. The total market has exploded to $366 million in volume, showing just how intense the buzz is right now.

Mamdani’s odds rocketed from 82% in August to a wild 99% in June, then settled in the 90s. The progressive turnout is huge, early voting up 5x from 2021, and he crushed Cuomo in the primary. The market’s calling this a “progressive wave locked in,” and Mamdani’s focus on housing and climate justice is hitting home for voters.

Cuomo’s way behind at 6%, but some see him as a possible spoiler if Curtis Sliwa drops out and anti-Mamdani votes shift his way. People are debating whether betting on Cuomo is a smart play or just gambling for long odds. Polls have Mamdani up by 14, but Polymarket’s got him with an even bigger lead—plus 88! Margin bets and arbitrage talk are everywhere.

The rest Adams, Lander, the long-shots barely register. All eyes are on short-term alpha and policy impact, from crypto regs to city innovation. Honestly, the energy and stakes here show just how prediction markets are reshaping the way America talks politics.

What’s the Buzz in the Market?

The easy summary: Zohran Mamdani is dominating the odds, like, seriously dominating. Nearly a third of all money traded is betting on him. Andrew Cuomo, who you probably know from his days as New York’s governor, is way back there, running at just 6%. Everyone else? Just blips on the screen.

But did you notice something weird in the numbers? Folks are still trading pretty heavily on long-shot candidates like Curtis Sliwa and Jim Walden even when their odds are under 1%. Sometimes markets get quirky like that. It could be people hedging, chasing big returns, or just betting that something wild could happen.

How Do These Odds Stack Up To History?

Let’s put the current frontrunner in perspective:

• Zohran Mamdani’s 94% odds are higher than just about any mayoral favorite in modern NYC market history.
• Andrew Cuomo’s odds (6%) reflect his profile, but also some skepticism among traders about a surprise comeback.
• And look at the outsiders names like Bloomberg, Adams, Giuliani, and Yang are barely getting any love from prediction traders.

The market volume is a story in itself. With $361 million traded, this is officially one of Polymarket’s biggest showdowns.

So, What Should You Do With All This Data?

Here’s some friendly, practical advice:

First: Remember, odds aren’t guarantees. When nearly everyone is betting on Mamdani, the crowd might be right but surprises can happen!

Second: Volume tells a deeper story. Look for unusual spikes in trading. If Curtis Sliwa’s volume jumps out of nowhere, something’s up maybe a rumor, maybe a late-breaking story.

Third: Don’t just follow Polymarket. Compare what you see here to traditional polls or even news headlines. Sometimes prediction markets react before polls do. Sometimes not.

Fourth: Watch for swings in odds or volume, especially as Election Day gets closer. Big news means big moves, and you’ll spot the action if you’re watching the charts.

Fifth: Be careful with your wallet. Just because Cuomo’s odds are low, doesn’t mean the upside is a sure thing. Markets can be volatile spread your bets, don’t chase wild swings.

Sixth: Check Polymarket’s rules. If there’s drama over recounts or delayed results, the market won’t immediately pay out. Odds (and your bets) can be frozen till everything’s official.

Bet Payout Scenarios: ROI Table

Wondering what you’d make (or lose) on a $100 bet at Polymarket? Let’s break it down so you can see why odds matter, how ROI changes, and what history shows about betting the favorites versus chasing upsets.

How It Works?

• Each share pays out $1 if your candidate wins.
• Current price per share (the “odds”) is what you pay up front.
• ROI (Return on Investment) depends on payout if your pick hits, minus your original outlay.

ROI Calculation Table

Candidate ROI and Payout Comparison

How to use this table:

• For favorites like Mamdani, you’ll earn small but likely returns, bet $100, get $106 if he wins (just a 6% profit).
• For long-shots like Cuomo or Sliwa, payouts skyrocket if they pull off a win. Bet $100 on Cuomo, and you could walk away with $1667, more than 15x your money (but odds reflect low likelihood).
• Historical data shows big upsets are rare. In most past NYC races, favorites took it home, meaning long-shot ROI is mostly theoretical.

Takeaways for Your Readers

• Low returns on favorites, but high win certainty.
• Long-shots offer massive payout but are risky and mostly lose historically.
• Savvy traders sometimes “hedge”, splitting bets on margins and candidate win to balance risk and upside.
• Always compare current odds to poll movement and market trends, sometimes shares are overpriced or underpriced for the risk!

One Last Bit of Friendly Advice

So here’s my two cents before the polls close, if you’re thinking about playing the prediction markets, do it for the right reasons.

Have fun with the numbers, dig into the data, and treat every trade as a learning experience. Sure, chasing a big payout is tempting when you see those massive ROI percentages, but don’t let the hype cloud your judgment. I always remind myself: when everyone’s rushing the same direction, there’s usually more risk hiding in the crowd.

Blend what you see on Polymarket with what you’re hearing from local news, actual pollsters, and your own gut. Diversify your bets if you want to play, and never wager more than you’re comfortable losing.

Personally, I get the most out of these markets by using them to test my own read of the race, sometimes I jump in for a little action, sometimes I just watch the odds and ride the excitement from the sidelines.

Above all, have fun with it. Prediction markets have made following elections more interactive and insightful especially when you use them as a tool, not just a temptation. Good luck, and here’s to seeing how the city votes!