In the United States, 41 states, the District of Columbia and Puerto Rico have lotteries. Lotteries are a form of gambling run by the state including instant-win scratch-off games, Lotto and daily games. Links to all official state lottery sites of the USA, for lottery results and information.
See also Lottery Results – Get Daily Lottery Results & Buy Tickets Online
USA Lottery Results – LottoServer

Official US Lottery Sites

Source: http://www.usa.gov/Topics/Lottery_Results.shtml