When George Avery Whitcomb was born on 23 October 1837, in Granville, Granville, Washington, New York, United States, his father, Benjamin Brown Whitcomb, was 40 and his mother, Sabina Duel, was 37. He married Sarah A. Towne on 24 June 1861, in Mount Carroll, Carroll, Illinois, United States. They were the parents of at least 1 son and 2 daughters. He lived in Mount Pleasant Township, Whiteside, Illinois, United States for about 30 years. He died on 22 May 1922, in Morrison, Whiteside, Illinois, United States, at the age of 84, and was buried in Morrison, Whiteside, Illinois, United States.