There are 10 US Post Offices in Lamoille County serving a total of 24,658 residents equating to 2,466 residents per post office. It's estimated that approximately 39,357 packages are handled across the 10 county post offices annually. Lamoille County /l\u0259\u02c8m\u0254\u026al/ is a county located in the state of Vermont, in the United States. As of the 2010 census, the population was 24,475, making it the third-least populous county in Vermont. Its shire town (county seat) is the municipality of Hyde Park. The county was created in 1835 and organized the following year."