Angelina & Stevon By rebeccatabak Oct 9, 1639 history of the u.s.p.s first post office in america opened in bosten massachusetts. Oct 9, 1775 history of the u.s.p.s benjaminfranklin named the first u.s. post master general Oct 9, 1788 THE CONSTITUTION the contitution gives congress the right to establish post office and post reads Oct 9, 2014 HISTORY OF THEUSPS