The Department of Justice maintains that, under the Wire Act, all Internet gambling by bettors in the United States is illegal. U.S. House of Representatives Committee on the Judiciary Hearing on Establishing Consistent Enforcement Policies in the Context of Online Wagers, 110th Cong., Nov.
As you can tell from the table above, only seven states in the U.S. currently have access to legalized online casinos, with those being Connecticut, Delaware, Michigan, New Jersey, Pennsylvania, and West Virginia.