Total gross receipts from online gambling for the month amounted to $89.2m (£64.2m/€75.0m), more than double the $42.7m reported in January.
However, as Michigan only opened its online gambling market on January 22, operators were only able to offer such services for the last 10 days of January.
Revenue from online sports betting dropped from $13.3m in January to $9.5m in February.
Players staked a total of $301.9m on sports wagering in February, an increase of 162.1% on the $115.2m bet in January, but as players won more, this pushed revenue down month-on-month.
MGM Grand Detroit and its BetMGM sportsbook claimed top spot in this market, posting $5.3m in revenue off of $75.7m in total wagers, while Greektown Casino, with its Barstool Sportsbook product, ranked second with $1.9m in revenue and a handle of $40.2m.