When John Corwin was born on 16 September 1781, in Aquebogue, Riverhead Town, Suffolk, New York, United States, his father, Maj John Corwin, was 25 and his mother, Joanna Mapes, was 23. He married Bethia Griffin on 12 November 1808, in Mattituck, Southold Town, Suffolk, New York, United States. They were the parents of at least 6 sons and 4 daughters. He lived in Southold, Southold Town, Suffolk, New York, United States in 1850. He died on 30 April 1859, in Aquebogue, Riverhead Town, Suffolk, New York, United States, at the age of 77, and was buried in Mattituck, Southold Town, Suffolk, New York, United States.