It was the first state in the US to legalize online gambling, doing so in 2012. While it is a relatively small state, it has embraced gambling in a way not many other states have. It was also one of the first states in the nation to embrace online gambling. It had a certain niche type of sports betting available thanks to the grandfather rule despite the presence of the federal ban on sports betting for many years. Are Online Casinos in Delaware Legal? Yes!ĭelaware is a state that has long been embracive of gambling.