There are 21 US Post Offices in Washington County serving a total of 56,635 residents equating to 2,697 residents per post office. It's estimated that approximately 90,396 packages are handled across the 21 county post offices annually. Washington County is a county located in the U.S. state of New York. As of the 2010 census, the population was 63,216. The county seat is Fort Edward. The county was named for the Revolutionary War general (and later President of the United States) George Washington. Washington County is part of the Glens Falls, NY Metropolitan Statistical Area, which is also included in the Albany-Schenectady, NY Combined Statistical Area."