BetMGM – The overall best online sports betting site in New Jersey.These are all fully licensed and regulated by the New Jersey Division of Gaming Enforcement, making them legal within state borders. List of the Best Sports Betting Sites in New Jerseyįor a quick start to NJ online sports betting, we highlight the top six sites below. Continue reading to learn more and find the perfect fit for online betting in the Garden State today. In this guide, we will cover the top New Jersey sportsbooks in detail, presenting their bonuses, promotions, banking methods, mobile apps, and much more. But what are the best options in the ever-growing powerhouse US betting state? Players within the state can take their pick from a list of legal NJ sports betting sites. After legalizing online sports betting in 2018, New Jersey licensed and launched the biggest and best brands in the nation.