According to Sports Betting Dime, US online casino revenue topped $1.03 billion in May, the fifth time in six months the seven legal iGaming states cleared the $1 billion mark. The total was up 14.7% from May 2025 and 2.4% from April.
The market first crossed $1 billion in December and has since been clearing that level with relative ease. Its table uses gross gaming revenue before promotional spending is removed, while some states publish adjusted gross revenue instead.
Growth has slowed from the end of 2025. May was the second straight month in which the year-over-year dollar gain was under $132 million, even as US iGaming revenue reached $5.04 billion through the first five months of 2026 and remained on pace to pass $12 billion for the year. Six of the seven legal online casino states posted year-over-year revenue gains of at least 10% in May, with Connecticut the lone holdout at 4.3%.
Michigan remained the strongest of the larger markets, with year-over-year growth above 20% throughout 2026, and Sports Betting Dime said Hard Rock Casino and bet365 Casino helped sustain that pace over the last six months. Michigan’s regulator reported $382.5 million in combined iGaming and online sports betting gross receipts in May, while Pennsylvania’s gaming board said total gaming revenue reached a record $625.47 million and iGaming revenue hit $254.83 million, up 9.44% from a year earlier.
