2026 Seoul Mayoral Election Winner

Platform comparison

Active sub-markets

Market context

Seoul will choose its next mayor on 3 June, and this market pays out on the named candidate who wins that race. A YES share wins if the specified candidate is declared the victor; a NO share wins if anyone else is confirmed. With the crowd-implied probability at 30%, traders are pricing in a material but not dominant chance of that outcome, which is lower than some recent polling-led narratives but still reflects a genuinely competitive contest.

For context, Seoul mayoral races often turn on national mood rather than only city-level issues. The incumbent party rarely has an automatic advantage when mid-term sentiment is weak, but challengers also need to convert campaign momentum into turnout. Recent English-language reporting has highlighted Democratic candidate Chong Won-o’s local profile and polling lead over People Power Party incumbent Oh Se-hoon, while The Korea Times and Chosun English have covered the formal candidate set and policy pledges. In a market like this, a probability around 30% is not a forecast of the vote share; it is the market’s estimate of the chance that this specific candidate wins outright.

The main catalysts before polling day are campaign events, any late polling shifts, and the extent to which national issues bleed into the race. Traders will watch whether the race remains a two-way contest, whether either side can frame housing, transport and local development as decisive issues, and whether party leaders or presidential politics change turnout expectations. The settlement rule matters too: if the result is not formally clear, the market falls back on official South Korean National Election Commission reporting, and if resolution drags beyond the deadline the contract can settle to Other.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

We track 2026 Seoul Mayoral Election Winner 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

Is this market available outside the US?

PolyGram 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.

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 it cost to trade on PolyGram?

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

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.

Do I need to KYC for this market?

Not under $1,500 of lifetime trading volume. Above that threshold, PolyGram triggers a quick verification flow that finishes in minutes.