The United States is not one market. Real-money online casino, online sports betting and sweepstakes sites are each legislated state by state, and the rules changed materially in 2025 and 2026. Pick your state to see what applies.
Your state
These states license real-money online casino operators directly.
Sports wagering is legal in some form, but online casino games are not licensed.
Neither online casino nor sports betting is licensed for residents.
Offshore crypto casinos hold licences from places like Curaçao or Anjouan. Those licences give them no standing with any US state regulator, and most of them block US residents in their own terms. A state that has not legalised online casino has not made an offshore site legal either.