When Sterling Clack was born on 17 November 1759, in Brunswick, Virginia, United States, his father, William M. Clack, was 23 and his mother, Elizabeth Twitty, was 20. He married Mary Polly Wood on 15 August 1780, in Warren, North Carolina, United States. They were the parents of at least 8 sons and 7 daughters. He lived in Tennessee, Tennessee, United States in 1830. He died on 6 November 1837, in Sumner, Tennessee, United States, at the age of 77, and was buried in Auburn, Barrow, Georgia, United States.