Barnet is a town in Caledonia County, Vermont, United States. The population was 1,663 at the 2020 census. Barnet contains the locations of Barnet Center, East Barnet, McIndoe Falls, Mosquitoville, Passumpsic and West Barnet. The main settlement of Barnet is recorded as a census-designated place by the U.S. Census Bureau, with a population of 127 at the 2020 census.

Caledonia County is a county located in the northeastern part of the U.S. state of Vermont. As of the 2020 census, the population was 30,233. Its shire town is the town of St. Johnsbury. The county was created in 1792 and organized in 1796. It was given the Latin name for Scotland, in honor of the many settlers who claimed ancestry there.