James Duncan born in Philadelphia, Pennsylvania. He attended the common schools and Princeton College. He served as the first prothonotary of Adams County, Pennsylvania. During the American Revolutionary War he was appointed as a lieutenant in Colonel Moses Hazen’s 2nd Canadian Regiment on November 3, 1776, and on March 25, 1778, was promoted to captain.
- United States Congress. "James Duncan (id: D000531)". Biographical Directory of the United States Congress.
- The Political Graveyard
|U.S. House of Representatives|
Thomas Grubb McCullough
| Member of the U.S. House of Representatives
from Pennsylvania's 5th congressional district
alongside: James McSherry