Horse racing betting is the only legal form of Internet betting in the U.S.

Horse racing betting is the only legal form of Internet betting in the United States; this has been the only sport that has enjoyed completed freedom in the United States.

Horse racing bets are made through the racing wagering systems and the US has allowed betting on horseracing for more than a decade.

Wagering services for bets on horse races are actually not allowed in the country, limited to the following states: Arkansas, California, Colorado, Florida, Idaho, Illinois, Kentucky, Louisiana, Maryland, Massachusetts, Michigan, Montana, New Hampshire, New York, North Dakota, Ohio, Oregon, Tennessee, Virginia, Washington, West Virginia and Wyoming.

Betting on horseracing is regulated by each state although horse races' betting is very popular on the state borders through legal pari-mutuel gambling. This sport holds one of the most important world championships, the Triple Crown, series of three races on Kentucky Derby, the Preakness Stakes and Belmont Stakes.