The purchase of pet monkeys is strictly regulated by both federal and state governments in the United States, and it is generally illegal to keep a monkey as a pet in the US. Those who wish to purchase pet monkeys and keep them in their home can look into primate sanctuaries, primate rescue centers or private breeders who specialize in monkeys, however it is highly recommended to do extensive research and always look into the laws and regulations governing pet monkeys in one’s particular area.