Players in Arizona spent $512.9m (£429.3m/€502.8m) on sports betting during April, while gross revenue for the month reached $29.2m.
The state’s handle was the second-highest monthly total since the launch of legal wagering, 25.8% behind the record $691.0m that was wagered in March of this year.
Consumers bet $509.5m online during the month, while the remaining $3.3m was spent at retail sportsbook locations.
Players won $482.4m from sports betting in April, which left $29.2m in gross revenue, 21.5% lower than the $37.2m figure in March.
After including $12.7m worth of free bets and promotional credits, taxable revenue for the month was $16.5m, down 11.8% from the previous month
The state was also able to collect $1.6m in tax from sports betting during April.
DraftKings again processed the most wagers during March, taking $155.9m in online bets, marginally ahead of FanDuel with $152.5m in combined online and retail wagers. BetMGM followed with $100.6m in online bets.
In terms of gross revenue, FanDuel was the clear leader with $16.3m in combined online and retail revenue, ahead of BetMGM on $7.7m in online-only revenue and DraftKings with $1.5m in online revenue.