Brainerd, John was born on February 28, 1720 in Haddam, Connecticut, United States. Son of Hezkiah and Dorothy Hobart (Mason) Brainerd.
Graduated from Yale, 1746.
Appointed Indian missionary by Correspondents of Society in Scotland for Propagation of Faith, 1747, dismissed for his inability to care for the Indians, 1755. Given charge of church, Newark, New Jersey. Trustee College of New Jersey, 1754.
Made several unsuccessful attempts at missionary work. His last post was pastor of church, Deerfield, New Jersey.
Married Experience Lyon, November 1752. Married second, Mistress.