Patrick Leahy Burlington International Airport in the context of "South Burlington, Vermont"

Burlington is a city in, and county seat of, Chittenden County, Vermont, United States. It is located 45 miles (72 km) south of the Canada–United States border and 95 miles (153 km) south of Montreal. As of the 2020 United States census, the population was 44,743. It is the most populous city in Vermont.

A regional college town, Burlington is home to the University of Vermont (UVM) and Champlain College. Vermont's largest hospital, the UVM Medical Center, is within the city limits. The City of Burlington owns Vermont's largest airport, the Patrick Leahy Burlington International Airport, located in neighboring South Burlington. In 2015, Burlington became the first city in the U.S. to run entirely on renewable energy.

Chittenden County (/ˈtʃɪtəndən/) 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.

It is one of the three counties that comprise the Burlington metropolitan area, along with the counties of Franklin and Grand Isle to the north and northwest, respectively. The University of Vermont, Vermont's largest university, is located in the county, as well as its affiliated hospital, the UVM Medical Center (which is Vermont's largest hospital and collectively forms the largest employer in the state along with the university). Vermont's largest private employer (GlobalFoundries) and largest airport (Patrick Leahy Burlington International Airport) are in the localities of Essex Junction and South Burlington, respectively.