South Korea Investigates Polymarket Users for Illegal Gambling

South Korean authorities have launched their first investigation into illegal gambling associated with Polymarket, a U.S.-based decentralized prediction market platform. The probe, led by Gangwon Provincial Police at the request of the National Police Agency, targets local users who allegedly participated in betting tied to recent local elections. Under South Korean law, these activities could result in fines of up to 10 million won ($6,500), as outlined in Article 246 of the nation’s Criminal Act.

This move marks a significant escalation in South Korea’s approach to blockchain-based prediction markets. Despite Polymarket being accessible in the country, South Korea’s strict anti-gambling laws prohibit online betting outside of government-sanctioned platforms like Sports Toto. Authorities appear to be applying these laws to decentralized platforms, treating them as illegal gambling rather than regulated financial instruments.

Election Betting Draws Regulatory Scrutiny

The timing of the investigation coincides with heightened betting activity surrounding South Korea’s recent local elections. One Polymarket contract centered on whether President Lee Jae Myung would leave office in 2026 saw nearly $54,000 in trading volume. The ruling Democratic Party’s strong performance, apart from Seoul’s mayoral race, may have contributed to the spike in prediction market participation.

This isn’t an isolated case. Polymarket’s political betting contracts have drawn global scrutiny in the past. For instance, U.S. lawmakers proposed legislation earlier this year to limit political prediction market trading by government officials after insider trading allegations surfaced on the platform. The company has since hinted at introducing mandatory Know Your Customer (KYC) protocols to align with global compliance standards.

A Broader Crackdown on Decentralized Prediction Markets

The South Korean investigation is part of a wider global crackdown on Polymarket and similar platforms. Countries including Singapore, Poland, Hungary, and Brazil have blocked access to Polymarket over concerns about unlicensed gambling. In South Korea, the Korea Communications Standards Commission (KCSC) recently began reviewing whether Polymarket should be classified as an illegal gambling service, which could lead to further enforcement measures such as ISP blocking or mandatory geofencing.

Blockchain-based prediction markets like Polymarket operate in a regulatory gray area in many jurisdictions. In the U.S., they are regulated by the Commodity Futures Trading Commission (CFTC) as derivatives platforms, but South Korea’s stringent anti-gambling laws leave little room for nuance. This fragmented regulatory landscape complicates the platforms’ ability to operate globally without running afoul of local laws.

Implications for the Digital Asset Market

South Korea’s enforcement actions against Polymarket highlight the challenges decentralized platforms face in jurisdictions with strict online gambling laws. This comes at a time when the country’s broader digital asset regulatory framework remains incomplete. While regulators have advanced measures for security tokens and stablecoins, comprehensive legislation covering digital assets—including prediction markets—has faced delays. This lack of clarity leaves platforms vulnerable to being classified as unlicensed gambling services.

For Polymarket, the stakes are high. The platform, which is already geoblocked in 35 regions, risks losing access to one of Asia’s most active crypto markets. For users, the risks are personal: South Korean nationals participating in such platforms could face significant fines or even criminal charges.

As South Korea intensifies its crackdown, the broader regulatory outlook for blockchain-based prediction markets could shift dramatically. Whether Polymarket and similar platforms can adapt to these challenges—or face increasing restrictions—remains an open question.

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