Offshore gambling operators are taking 61% of all US online gambling revenue, according to a new report published in June 2025. Despite multiple states having strict regulations, international operators are still dominating the market — generating an estimated $4.67 billion in GGR from US players every year.

The report, commissioned by the Campaign for Fairer Gambling and written by Yield Sec, shows the challenge legal US operators face in competing with unlicensed operators that operate outside of federal and state jurisdiction. These offshore sites offer online casino, slots and poker — verticals that are not yet fully legal in many US states, giving them an unfair advantage.

The report also highlights the enforcement gaps: 481 offshore brands were active in the US market during the study period, compared to 27 regulated operators. Many of these unlicensed sites are still aggressively advertising and accepting players with no restrictions.

As the US continues to roll out legal online gambling state by state, the pressure is mounting on regulators to reduce offshore market share — especially as legal operators demand a level playing field on taxation, consumer protection and advertising compliance.

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