When Walter Barry Sisson was born on 5 September 1890, in Montross, Westmoreland, Virginia, United States, his father, William Henry Sisson, was 34 and his mother, Willie Ann Collins, was 30. He married Sarah Anne Belfield on 14 December 1911, in Washington, District of Columbia, United States. They were the parents of at least 2 sons. He lived in Montross Magisterial District, Westmoreland, Virginia, United States in 1900 and Templeman, Westmoreland, Virginia, United States in 1970. He died on 26 February 1977, in Tappahannock, Essex, Virginia, United States, at the age of 86.