Bennington County is a county in the U.S. state of Vermont. As of the 2020 census, the population was 37,347. The shire towns are jointly Bennington and Manchester, and the largest municipality is Bennington. The county was created in 1778.

A county seat is an administrative center, seat of government, or capital city of a county or civil parish. The term is in use in five countries: Canada, China, Hungary, Romania, and the United States. An equivalent term, shire town, is used in the U.S. state of Vermont and in several other English-speaking jurisdictions. County towns usually serve a similar function in Ireland, Jamaica, and the United Kingdom.