South Korea Blocked Polymarket After $52M in Election Bets Caught the Wrong Attention

Key Points

• The Korean Communications Standards Commission of South Korea made a decision on 18 August 2026 to ban Polymarket, as its “winner-take-all” system is considered gambling according to the Criminal Act and the National Sports Promotion Act.
• Korean investors put over $52 million into Polymarket contracts related to the elections before the 3 June 2026 local elections with $45 million invested in the Seoul mayoral race market only.
• Korean users, trying to overcome the ban by using a virtual private network, will be subject to a fine of up to 10 million won ($7,000) according to Article 246 of the Criminal Act.

What Seoul Actually Just Decided?

On August 18, 2026, the Korea Communications Standards Commission (KCSC) instructed internet service providers in South Korea to block Polymarket, which is a prediction market that uses blockchain technology for betting on real-world events using cryptocurrencies. The ban was issued following the decision by the Korea Communications Standards Commission’s Telecommunications Deliberation Subcommittee to block the website, stating that it offers an “illegal gambling environment.”

The KCSC had made consultations with three organisations before arriving at the decision: the Korean National Police Agency, the Gambling Control Commission, and the Korea Sports Promotion Foundation. All three said Polymarket’s operating structure could fall within domestic gambling laws. The commission’s published position was direct: “Technical features or service methods cannot exempt a platform from domestic legal compliance. Since Polymarket provides a real illegal gambling environment to domestic users, access blocking is unavoidable to protect them.”

Two laws drove the ruling. Under South Korea’s Criminal Act, the platform was found to carry information facilitating gambling and the establishment of gambling venues. Sports-related markets also breached the National Sports Promotion Act, which prohibits activities resembling licensed sports betting.

How $52 Million in Election Bets Started the Clock?

The sequence that ended with an 18 August block began with money. Ahead of South Korea’s 3 June 2026 local elections, Korean traders placed more than $52 million into election-related Polymarket contracts. The Seoul mayoral race market alone drew nearly $45 million in cumulative trading. A contract asking whether President Lee Jae-myung would leave office in 2026 added further volume.

The action did not go unnoticed by the police. The Gangwon Provincial Police Agency started a criminal investigation of domestic Polymarket users on June 5 at the behest of the National Police Agency based on Article 246 of the Criminal Act of South Korea, which bans betting on any activity outside official government institutions. South Korea allows sports betting exclusively via Sports Toto, where bets are limited to 100,000 won, or about $71. Anything beyond that is considered illegal private gambling, and this applies even abroad.

The KCSC opened its formal review on 21 May 2026 and gave Polymarket a window to submit a written defence by 6 July. That window closed without a result the commission found convincing.

Polymarket Argued Blockchain – Regulators Disagreed

Polymarket’s defence had three pillars. First, the company said it had removed its Korean-language interface by late July 2026. Second, it had disabled payments in Korean Won. Third, the non-custodial, peer-to-peer system uses smart contracts, which means that the company never holds users’ funds directly. On these grounds, Polymarket stated to the commission: “As we operate using non-custodial peer-to-peer (P2P) transactions and smart contracts, we do not act as an ‘organiser’. Furthermore, because we do not directly collect or manage funds, nor do we issue sports lottery tickets, we do not satisfy the legal requirements for violating the Criminal Act or the National Sports Promotion Act.”

The KCSC rejected each argument. On language and currency, regulators pointed out Korean users could still trade using cryptocurrency, making won support or interface language irrelevant to the access question. On the blockchain defence, the commission was direct: decentralised technology and an order book do not exempt any service from South Korean law when domestic users can still reach it and lose money on it.

One piece of evidence proved hard to argue away. A market on August rainfall in Seoul showed the platform was producing content specifically aimed at Korean users. The commission also found Polymarket manages market creation, sets trading rules, runs crypto deposit and withdrawal infrastructure, settles trades, and collects transaction fees. That level of operational control, regulators said, makes it the effective organiser of every wager placed on the platform.

Korean Users Are Now in a Tighter Position Than Before

As soon as the firewall comes into effect, Polymarket becomes inaccessible by way of ordinary domestic Internet access. Even if one tries to bypass it using a VPN service, there will still be legal consequences. In accordance with Article 246 of the Criminal Act, the penalty for online gambling may be a fine of up to 10 million won, or $7,000. Also, according to Seoul legal authorities, it is likely that legal action will be taken against domestic bettors, following the classification of Polymarket as an illegal gambling site by KCSC.

Users holding open positions face uncertainty. Polymarket has typically switched blocked jurisdictions to close-only mode, allowing existing positions to settle but preventing new orders. At the time of the ruling, the company had not issued a public statement on how Korean accounts would be handled.

More Than 30 Countries Have Now Moved Against Polymarket

South Korea’s block did not arrive in isolation. Singapore blacklisted Polymarket in January 2025. France banned access from 16 July 2026, citing risk of large user losses and potential betting manipulation. Australia and Germany imposed blocks in August and September 2025. Indonesia moved in May 2026 after a contract speculating on President Prabowo Subianto’s early exit drew public anger. India’s Ministry of Electronics and Information Technology issued a blocking advisory in April 2026, citing stablecoin payment flows and offshore capital risks.

South Korea joins more than 30 jurisdictions restricting the platform. That matters because Polymarket’s monthly trading volume peaked at $10.57 billion in March 2026, roughly six times the level of six months prior. South Korea is one of Asia’s most active retail crypto markets, and losing direct access there reduces the active trader pool that gives Polymarket’s contracts their pricing depth.

Expert Analysis

Seoul’s decision is worth watching beyond South Korea because of the regulatory logic it used. The KCSC did not need to settle whether blockchain is decentralised or whether smart contracts are financial instruments. It asked one question: does this platform create an environment where Korean users can lose money on uncertain events? The answer was yes, and that settled the matter.

South Korea is building digital asset frameworks at the same time, working on stablecoin regulation and crypto ETF access. The contrast is deliberate: the country is not hostile to crypto broadly, only to crypto products it reads as gambling. Removing a Korean-language interface and disabling won payments did not satisfy Seoul. What satisfies a regulator using this framework is a licensing structure that puts the product inside the law, not technical adjustments designed to sit just outside it.