According to Sports Betting Dime, U.S. online casino revenue in the seven legal iGaming states reached $1.03 billion in May. It was the fifth time in six months that the sector cleared $1 billion, and the total was up 2.4% from April and 14.7% from May 2025.
The outlet said the $1 billion mark was first crossed in December and has been surpassed every month since. It also reported that six of the seven legal states posted year-over-year revenue gains of at least 10% in May.
Connecticut was the only state below that level, with a 4.3% increase. Michigan continued to post the biggest jumps among the major markets, while Pennsylvania and New Jersey were more often in the 10% to 15% range.
RG describes Michigan as a structurally balanced iGaming market that combines commercial Detroit casinos with tribal gaming operators under a unified regulatory framework. Its Michigan page says the market has a monthly revenue stability band of $95 million to $120 million, and that January 2026 casino revenue was $106.5 million with $8.63 million in tax collection.
RG says Michigan legalized casino gambling in Detroit in 1987, while the 2019 Michigan Gaming Control and Revenue Act authorized online casino gaming and online poker. Licensed online platforms launched in early 2021 under MGCB oversight, and digital gaming helped stabilize aggregate casino revenue as physical venues reopened after the 2020 closures.
Sports Betting Dime said Michigan has maintained high growth rates after the addition of Hard Rock Casino and bet365 Casino over the last six months. With May pushing 2026 iGaming revenue through five months to $5.04 billion, the outlet said the market is on pace to top $12 billion this year.
