Sargent, Winthrop was born on September 23, 1825 in Philadelphia, Pennsylvania, United States. Son of George Washington and Margaret (Percy) Sargent.
Graduated from the University Pennsylvania, 1845, Harvard Law School, 1847.
Author Life and Career of Major John Andre, 1861. Edited (with notes) The History of an Expedition against Fort du Quesne in 1775, published 1855, The Loyal Verses of Joseph Stansbury and Doctor Jonathan Odell, 1860.