The Burlington metropolitan area is a metropolitan area consisting of the three Vermont counties of Chittenden, Franklin, and Grand Isle. The metro area is anchored by the principal cities of Burlington, South Burlington, St. Albans, Winooski, and Essex Junction; and the towns of Colchester, Essex and Milton. According to 2020 U.S. Census, the metro area had a population of 225,562, approximately one third of Vermont's total population.

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.