There are 10 US Post Offices in Essex County serving a total of 6,617 residents equating to 662 residents per post office. It's estimated that approximately 10,561 packages are handled across the 10 county post offices annually. Essex County is a county located in the northeastern part of the state of Vermont, in the United States. As of the 2010 census, the population was 6,306, making it the least-populous county in both Vermont and New England. Its shire town (county seat) is the municipality of Guildhall. The county was created in 1792 and organized in 1800. Bordered by the Connecticut River next to New Hampshire, Essex County is part of the Berlin, New Hampshire micropolitan area. It is located south of the Canadian Province of Quebec."