Williston is a town in Chittenden County, Vermont, United States. Originally rural and laid out with many farms, in recent decades it has developed into a thriving suburb of Burlington, the largest city in the state of Vermont. As of the 2020 census, the population of Williston was 10,103, an increase of over 1,000 people since the 2010 census. Williston is one of the fastest-growing towns in Vermont, and while becoming more populated, it has also developed as a major retail center for the Burlington area as well as much of central and northern Vermont. The town has a National Register Historic District in its unincorporated central village.

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.