According to data from the Jersey Division of Gaming Enforcement, the state collected figures of around $748.5 million in sports betting wagers.
The statistics show that more than 90% of the wagers were made via mobile devices, with much of the betting concerning the recent US Open in golf, as well as the French Open in tennis.
But other sports were also important in reaching the all-time record, with Major League Baseball (MLB), the National Hockey League (NHL), the National Basketball Association (NBA) and the National Football League (NFL) all playing an integral role.
The $748.5m total eclipses the previous US monthly tally of $667.9m, which came in August 2020 and was also recorded by New Jersey.
The Garden State has now taken in more than $3.28 billion in sports betting handle this year.
The repeal of the Professional and Amateur Sports Protection Act (PASPA) in 2018 saw New Jersey become the third state to legalise widespread sports betting, following in the footsteps of Delaware and Nevada.
The latter has recorded the three highest handle months after New Jersey.
In 2019, Nevada recorded figures of $614.1m and $596.7m in November and March respectively, having recorded $581m in November 2018.
