There are 35 US Post Offices in Windsor County serving a total of 56,986 residents equating to 1,628 residents per post office. It's estimated that approximately 90,956 packages are handled across the 35 county post offices annually. Windsor County is a county located in the state of Vermont, in the United States. As of the 2010 census, the population was 56,670. The shire town (county seat) is the municipality of Woodstock. The county's largest municipality is Hartford. This county is notable for being the birthplace of the first Prophet of the Church of Jesus Christ of Latter-day Saints, Joseph Smith, Jr."