Jacob MacAuliffe (died 1878) was an Irish-American sex slaver associated with the nativist "Teddy Boys" gang who lived in San Francisco, California during the 1870s. In 1878, he and several other Irishmen slavers who were sexually abusing Chinese sex slaves at a makeshift brothel were massacred by the vigilantes Ah Toy and Lai at the behest of Nellie Davenport, and the Chinese women were freed from bondage.