When Benajah Phelps was born on 14 March 1770, in Goshen, Litchfield, Connecticut Colony, British Colonial America, his father, Abel Phelps, was 30 and his mother, Lucy Beardsley, was 24. He married Elizabeth Graham about 1794. They were the parents of at least 3 sons and 4 daughters. He lived in Chittenden, Vermont, United States in 1800 and Franklin, Vermont, United States in 1810. He died on 12 April 1862, in South Hero, Grand Isle, Vermont, United States, at the age of 92, and was buried in South Hero Cemetery, South Hero, Grand Isle, Vermont, United States.