Essex Junction is a city in Chittenden County, Vermont, United States. As of the 2020 U.S. census, the population was 10,590. It was incorporated as a village on November 15, 1892. Essex Junction became Vermont’s 10th city on July 1, 2022.

Chittenden County is the most populous county in the U.S. state of Vermont. As of the 2020 census, its population was 168,323. The county seat is Vermont's most populous municipality, the city of Burlington. The county has over a quarter of Vermont's population and more than twice the population of Vermont's second-most populous county, Rutland. The county also has more than twice the population density of Vermont's second-most dense county, Washington. The county is named for Vermont's first governor and one of the framers of its constitution as an independent republic and later U.S. state, Thomas Chittenden.