When Job Trowbridge was born on 8 March 1754, in Morristown, Morris, New Jersey, United States, his father, David Trowbridge, was 44 and his mother, Lydia Holmes, was 38. He married Martha Doty on 3 January 1785, in Wantage, Sussex, New Jersey, United States. They were the parents of at least 5 sons and 4 daughters. He died on 12 August 1821, in Hart, Kentucky, United States, at the age of 67.