Mechanicville is a is located on the eastern border of Saratoga County. Mechanicville borders the towns of Stillwater - of which it was once a part - and Halfmoon, and the town of Schaghticoke in Rensselaer County.
The first documented occurrence of the name "Mechanicville" dates back to 1829. The name comes from the early settlers, who were independent mastercraftsmen such as millers, carpenters, or butchers, whose professions were commonly known as the "mechanical arts" at the time. About 35 years later, small flour mills were already established. When the Champlain Canal reached the settlement in 1823, and especially when the Rensselaer and Saratoga Railroad laid a track through the area in 1835, Mechanicville became an important commerce interchange.
The city of Mechanicville is on the west bank of the Hudson River at the influx of Anthony Kill. US Route 4, and conjoined New York State Route 32 are north-south highways through Mechanicville. New York State Route 67 intersects NY-32 and US-4 in the city. County Roads 75 and 1345 also lead into the city.