South Korea opens first criminal probe into Polymarket users

South Korean police have opened what is reported as the country's first criminal investigation into domestic users of Polymarket, the world's largest prediction market, on suspicion of illegal gambling. The Gangwon Provincial Police Agency is leading the inquiry at the request of National Police Agency headquarters, according to a Chosun Biz report cited by Coingape and crypto.news. The probe looks at users nationwide, including in Gangwon Province, and rests on Article 246 of South Korea's Criminal Act, which covers gambling offenses.

The action targets the people who placed bets, not Polymarket itself, and it tests how a blockchain-based prediction market is treated under a gambling law written long before such platforms existed. What is confirmed is narrow: an investigation has opened. Whether the activity actually breaks the law, and whether anyone is charged, is not settled.

What are the police investigating?

The inquiry covers South Korean residents who placed bets on Polymarket, and it spans users nationwide rather than one region, though it includes Gangwon Province where the lead agency sits. FinanceFeeds reports the focus is whether residents who placed those bets violated Article 246 of the Criminal Act. The question on the table is conduct by users, not the operation of the platform.

Polymarket is an Ethereum-based platform where people buy and sell positions, or shares, on the outcome of real-world events, as crypto.news describes it. A user takes a position on whether something will happen, and the value of that position settles based on the result. Police are examining whether placing those positions, from within South Korea, counts as gambling under domestic law.

What law is in question?

The legal basis is Article 246 of South Korea's Criminal Act, the provision that covers gambling and habitual-gambling offenses, per Blockonomi, FinanceFeeds and crypto.news. Under it, a person found in violation could face a fine of up to 10 million won, according to Blockonomi and FinanceFeeds.

How that statute applies to a blockchain-based prediction market is the open question. There have been no domestic cases of punishment for Polymarket use in Korea, and Blockonomi notes that makes the likely penalty hard to predict. The investigation will test whether buying and selling event positions on such a venue falls inside the definition of gambling that Article 246 covers. That reading has not been settled by a court here, which is part of why the case carries weight beyond the users named in it.

Why now?

The trigger was heavy betting tied to South Korea's June 3 local elections. Wagering on those races was reported in the hundreds of billions of won on Polymarket by Blockonomi, FinanceFeeds and crypto.news, though Coingape put the figure lower, at tens of billions; either way the volume drew the attention that led to the probe. The second Blockonomi report frames the action as following significant betting on the Korean local elections.

Access is the other half. Polymarket remains reachable in South Korea, with no IP restrictions and no local regulatory oversight, according to Blockonomi. Users have been able to reach the platform and place bets without a technical block, which is part of why authorities are now looking at the users themselves rather than at a barrier that was never there.

What it means for prediction markets

The case is being read as a test of how existing gambling law treats a blockchain-based prediction market, and the second Blockonomi report suggests it could shape the regulatory approach to such platforms in South Korea. Because there is no domestic precedent for punishing decentralized-platform users, the outcome could mark out where the line sits between trading on event outcomes and gambling under Korean law.

The confirmed facts stay limited. An investigation has opened, led by the Gangwon Provincial Police Agency at national headquarters' request, on suspicion of offenses under Article 246. No charges or convictions have been reported, and no court has ruled on whether using Polymarket breaks the law. The next markers worth watching are whether the probe produces charges, and how Korean authorities and courts characterize prediction-market activity under a statute that was not written with it in mind.