Burlington is the most populous city in the U.S. state of Vermont and the county seat of Chittenden County. The municipality is the center of the Burlington, Vermont metropolitan area and lies 45 miles (72 km) south of the Canada–United States (Quebec–Vermont) border and 94 miles (151 km) south of Montreal. The municipal population was 42,452 according to a 2015 U.S. census estimate. Burlington is the least populous city in the U.S. to be the most populous within a state.
A regional college town, the city is home to the University of Vermont (UVM) and Champlain College, a small private college. Vermont's largest hospital, the UVM Medical Center, is located within the municipal limits. Burlington became the first city in the U.S. to run completely on renewable energy in 2015.