Wynkoop was born in Northampton Township in the Province of Pennsylvania on March 2, 1737. He inherited his father's 153 acre farm in Newtown upon his death in 1759. He was admitted to Princeton University but he did not complete his studies as he got involved in local politics."Henry Wynkoop: Princeton, Class of 1760". Rootsweb.com Wynkoop Family Research Library. Retrieved July 7, 2015.
