When John Perry III was born on 3 March 1669, in Watertown, Middlesex, Massachusetts Bay Colony, British Colonial America, his father, John Perry II, was 25 and his mother, Sarah Price, was 21. He married Sarah "Sary" Hill Price on 9 July 1693, in Watertown, Watertown, Middlesex, Massachusetts, United States. They were the parents of at least 1 son and 6 daughters. He died on 6 August 1725, in Cambridge, Middlesex, Massachusetts Bay Colony, British Colonial America, at the age of 56.