Mechanicville is a city in Saratoga County, New York, United States. The population is 5,196 as of the 2010 census. It is the smallest city by area in the state. The name is derived from the occupations of early residents.
The city is located on the eastern border of Saratoga County and is north of Albany, the state capital. Mechanicville borders the towns of Stillwater and Halfmoon in the county, and the town of Schaghticoke, Rensselaer County.