Police say the mother and her eight- and nine-year-old sons were located in New York State.
Police say they are giving no other details at this time.
Investigators say two men believed to have been with the woman and her sons have not been found.
Police issued the Amber Alert alleging the boys had been abducted in Brampton, Ont., on Friday morning.
Amber alerts are generally issued in cases where children are believed to be in imminent danger.