Ballston Spa is a village in Saratoga County, New York in the USA. The population was 5,556 at the 2000 census. It is the county seat of Saratoga County. The name is from Eliphalet Ball, an early settler. North Ballston Spa apartments for rent comparison page shows most up to date rent information on North Ballston Spa apartments and houses. Rent information is obtained from multiple rental sources but we cannot guarantee their accuracy.