When William Stedman was born on 4 March 1795, in South Kingstown, Washington, Rhode Island, United States, his father, Capt. Thomas Steadman, was 28 and his mother, Lydia Sweet, was 28. He married Lucinda Heath about 1819, in Massachusetts, United States. They were the parents of at least 3 sons and 4 daughters. He lived in Tyringham, Berkshire, Massachusetts, United States in 1870. He died on 9 June 1870, in Berkshire, Massachusetts, United States, at the age of 75, and was buried in Tyringham, Berkshire, Massachusetts, United States.