Elmsford is a village in Westchester County, New York, United States. It is part of the New York metropolitan area. Roughly one mile square, the village is fully contained within the borders of the town of Greenburgh. As of the 2010 census, the population of Elmsford was 4,664.
Elmsford was largely farmland throughout its early history. The construction of railroads in the late 19th century brought new prominence to the area, and in 1910 it was incorporated as a village.The area was known from colonial times as "Storm's Bridge" and later, "Hall's Corners", names derived from the principal landowners of the times. In 1870, the growing village was officially renamed "Elmsford" in honor of a local landmark, a giant elm tree (since deceased). The names Elmsford and Storm's Bridge are reminders of the nearby Saw Mill River, which once had significant tributaries flowing through the village.