When Luther Dewey Harmon was born on 3 April 1800, in Bennington, Bennington, Vermont, United States, his father, Luther Harmon, was 30 and his mother, Betsey French, was 24. He married Debora Fellows in February 1832, in Pomfret, Chautauqua, New York, United States. They were the parents of at least 2 sons and 3 daughters. He died on 20 July 1860, in Westfield, Westfield, Chautauqua, New York, United States, at the age of 60, and was buried in Westfield, Westfield, Chautauqua, New York, United States.