2026 Seoul Mayoral Election Winner

Resolution Criteria

The 2026 Seoul mayoral election is scheduled to take place on June 3, 2026 to elect the next mayor of Seoul. This market will resolve according to the listed candidate that wins this election. If the result of this election isn't known by January 31, 2027, 11:59 PM ET, the market will resolve to "Other". This market will resolve based on the result of the election as indicated by a consensus of credible reporting. If there is ambiguity, this market will resolve based solely on the official results as reported by the South Korean government, specifically the National Election Commission.

Chong Won-oh is the heaviest-backed contender to win the 2026 Seoul mayoral election in current prediction market trading, with incumbent Oh Se-hoon the second most heavily backed. The market spans 66 named outcomes but volume is strikingly concentrated on these two candidates, forming a clear two-horse race. Resolution is based on the official result of the 3 June 2026 election as reported by South Korea's National Election Commission.

Market structure

The market lists 66 possible outcomes but volume is overwhelmingly concentrated on two candidates: Chong Won-oh and Oh Se-hoon, with all remaining candidates attracting negligible trading. Resolution is determined by the official winner of the Seoul mayoral election on 3 June 2026, confirmed by a consensus of credible reporting or, where ambiguous, by the South Korean National Election Commission's official results. If no result is known by 31 January 2027, the market resolves to 'Other'.

Background

Seoul is South Korea's capital and largest city, home to roughly ten million residents, making its mayoralty one of the most prominent elected positions in the country. The June 2026 election forms part of South Korea's nationwide local elections cycle, held every four years. Oh Se-hoon, a conservative People Power Party figure, has served as mayor since winning a 2021 by-election and was re-elected in 2022. South Korean local elections have historically been sensitive to national political currents, including the relative standing of the ruling and opposition parties at the time of the vote. The political environment in South Korea has been unusually turbulent in recent years, with significant shifts in public sentiment affecting both presidential and local contests.

Key factors

Several structural factors could influence how this market resolves. The national political climate in South Korea at the time of the June 2026 vote will likely shape voter behaviour at the local level, as has been a consistent pattern in previous local elections. Candidate nomination processes within both the ruling People Power Party and the main opposition Democratic Party of Korea will determine which figures ultimately appear on the ballot; candidates currently listed in the market may or may not secure their party's nomination. A primary or unified candidacy process on the opposition side could consolidate support, while a fragmented field would distribute it. Voter turnout patterns, particularly among younger Seoul residents, have historically favoured different parties under different conditions. Any late-breaking national political events — such as a change in government approval ratings, a major policy controversy, or a legal development affecting key figures — could shift momentum in the weeks before polling day.

FAQ