There are 27 US Post Offices in Windham County serving a total of 77,157 residents equating to 2,858 residents per post office. It's estimated that approximately 123,151 packages are handled across the 27 county post offices annually. Windham County is a county located in the state of Vermont, in the United States. As of the 2000 census, the population was 44,513. The county's shire town (seat) is Newfane, and the largest municipality is Brattleboro. The county is known for its counterculture."