In the earlier stages of recovery from the Covid-19 pandemic, this was a rise of 7.9% from May 2021.
The slot machines continued to generate the most gross gaming revenue, at $2.94 billion, down just 0.1% from a year ago.
Sports betting revenue came to $487.5m, an increase of 78.2%, and GGR from table games came to $873.9m, a rise of 10.5%.
Online gaming revenue increased by 30.9%.
The year to date total GGR is $24.39 billion, an increase of 20.6% from the same period in the previous year.
Table games revenue has grown by 38.2% so far this year and slots revenue has increased by 11%.
Sports betting revenue increased by 73.5% in the first nine months of the year. The online gaming GGR increased by 45.6%.
According to the AGA, March, April and May have been the three most successful months for gaming in industry history.
The AGA reported the highest revenue ever for commercial gaming in the first quarter.
The gross gaming revenue (GGR) in the US rose by 7.9% year-on-year to $5.1 billion in May, according to data released by the American Gaming Association (AGA). GGR from table games amounted to $873.9m, a rise of 10.5% year-on-year, while sports betting revenue came to $487.5m, up significantly by 78.2%. For the year to date, total GGR is $24.39 billion, up 20.6% from the same period in 2021.