Bucks County commissioner.
Member of the Pennsylvania Assembly (1775). Delegate to the Pennsylvania state constitutional convention (1790). Member of the Pennsylvania state senate (1790-99).
Son of Thomas and Mercy (Wildman) Jenks of Middletown, Pennsylvania. Married Rebecca Richardson (1762); nine children. Quaker.
First letter in correspondence: March 10, 1788; William W. H. Davis, History of Bucks County, Pennsylvania (2nd ed., 3 vols., New York, 1905), iii, 38-9.