Gross gaming revenue for the opening month of 2021 amounted to $23.1m, up 25.5% from the previous record of $18.4m set in November and also 34.3% higher than $17.2m in December.
Online accounted for $22.7m of revenue in January, compared to $481,276 from retail, land-based sports wagering facilities.
In terms of handle, players in Colorado spent $326.9m in sports betting during the month, an increase of 14.9% on the existing record of $284.6m reported in December.
Basketball was the most popular sport to wager on in the month with a total of $88.4m in bets.
Football also proved popular, attracting $75.0m in bets, helped by the National Football League’s play-offs and championship games.