U.S. online casino revenue cleared the $1 billion mark again in May, reaching $1.03 billion across the seven legal iGaming states. According to Sports Betting Dime, it was the fifth time in six months that the sector topped that threshold.
May’s $1.03 billion total represented a 14.7% increase versus May 2025 and a 2.4% rise compared with April. Sports Betting Dime said the year-over-year gains were also starting to slow from the pace seen at the end of 2025.
The report said clearing $1 billion first happened in December, and that February was the lone month that did not hit the mark. It also described May as the second consecutive month where year-over-year revenue growth was under $132 million.
Looking at the wider tally, Sports Betting Dime reported that U.S. iGaming revenue stood at $5.04 billion through five months of 2026. The same article said the country was on pace to surpass $12 billion in revenue for the year.
By state performance, Sports Betting Dime reported that six of the seven legal online casino states saw year-over-year revenue increases of at least 10% for May. It said Connecticut was the exception, posting 4.3% year-over-year growth.
Michigan continued to post stronger gains than its peers, with Sports Betting Dime stating it stayed above 20% throughout 2026. The report attributed those higher growth rates to the addition of Hard Rock Casino and bet365 Casino in the prior six months, saying the two operators heavily outperformed earlier options and helped Michigan close the gap on Pennsylvania.
Sports Betting Dime said Pennsylvania and New Jersey had been hovering around 10% to 15% year-over-year growth in recent months. For readers, the article also noted that some states individually report adjusted gross revenue (AGR), which removes promotional spend from winnings, while its table reflects gross gaming revenue before promotional spending is taken out.
