There are 57 US Post Offices in Fayette County serving a total of 129,912 residents equating to 2,279 residents per post office. It's estimated that approximately 207,354 packages are handled across the 57 county post offices annually. Fayette County is a county located in the U.S. state of Pennsylvania. Fayette County is located in southwestern Pennsylvania, adjacent to Maryland and West Virginia. As of the 2010 census, the population was 136,606. Its county seat is Uniontown. The county was created on September 26, 1783, from part of Westmoreland County and named after the Marquis de Lafayette. Fayette County is part of the Pittsburgh, PA Metropolitan Statistical Area."