Saratoga County is a county in the U.S. state of New York, and is the fastest-growing county in Upstate New York. As of the 2020 U.S. census, the county's population was enumerated at 235,509, its highest decennial count ever and a 7.2% increase from the 219,607 recorded at the 2010 census, representing one of the fastest growth rates in the northeastern United States; and despite the worldwide toll of the COVID-19 pandemic in the early 2020s, Saratoga County has continued its rapid growth. The county seat is Ballston Spa. The county is part of the Capital District region of the state.