South Korean police have launched the country’s first criminal investigation into domestic users of Polymarket, bringing prediction-market activity into direct contact with national gambling law. The June 5, 2026 inquiry is focused on whether South Korean users broke gambling statutes by placing bets on the U.S.-based platform.
The probe is being led by the Gangwon Provincial Police Agency under direction from the Korean National Police Agency. Its immediate significance is clear: authorities are targeting the individuals who used Polymarket, not the platform itself, creating a sharper compliance question for traders, custodians, treasury teams and crypto service providers.
Election Betting Pushes Polymarket Into Legal Focus
Authorities are examining the case under Article 246 of South Korea’s Criminal Act, which criminalizes unauthorized gambling and habitual gambling. Legal betting in the country is largely limited to state-sanctioned products such as Sports Toto, while violations can carry fines of up to 10 million won, or about $6,500.
The investigation began after police observed substantial betting activity tied to the June 3 local elections. Reported wagers on Polymarket reached hundreds of billions of Korean won, turning election-linked markets into a high-stakes test of how existing gambling rules apply to online prediction platforms.
Investigators are now reviewing trading records and transaction traces connected to users located in South Korea. The central question is whether participation through a foreign, web-based prediction market can still be treated as illegal wagering under domestic law.
Legal counsel for some subjects has acknowledged the potential exposure while emphasizing the uncertainty around precedent. “The legal elements required for a gambling offense appear to be present,” said An Chang-bo, head lawyer at Respect Law Office, adding that South Korea has no clear precedent for decentralized prediction-market cases.
Compliance Risk Extends Beyond Users
The probe creates immediate operational concerns for crypto companies handling related flows. Compliance and legal teams may need to reassess domestic exposure, review monitoring rules for election-linked activity and preserve records tied to potential police requests, especially where prediction-market transactions can be mapped to South Korean users.
Entities with South Korean user exposure face a broader control challenge. They may need protocols for subpoenas or preservation orders, while exchanges and custody providers are likely to evaluate access controls and geofencing measures to reduce regulatory risk.
Positions originated by South Korean users could face seizure or follow-on litigation, and liquidity in specific prediction markets may compress if enforcement pressure discourages domestic participation.
The outcome will help define how South Korea enforces gambling statutes against online prediction markets. Until prosecutions or administrative actions are resolved, the case stands as a practical precedent-setting moment for compliance teams operating in jurisdictions where prediction-market rules remain unsettled.
