Montgomery County, New York

Montgomery County
Location within the U.S. state of New York
New York's location within the U.S.
Coordinates: 42°55′N 74°26′W / 42.91°N 74.44°W / 42.91; -74.44
Country United States
State New York
FoundedMarch 12, 1772
Named afterRichard Montgomery
SeatFonda
Largest cityAmsterdam
Area
  Total
410 sq mi (1,100 km2)
  Land403 sq mi (1,040 km2)
  Water7.3 sq mi (19 km2)  1.8%
Population
 (2020)
  Total
49,532
  Estimate 
(2024)
49,648
  Density123.2/sq mi (47.6/km2)
Time zoneUTC−5 (Eastern)
  Summer (DST)UTC−4 (EDT)
Congressional districts20th, 21st
Websitewww.co.montgomery.ny.us

Montgomery County is a county in the U.S. state of New York. As of the 2020 census, the population was 49,532. The county seat is Fonda. The county was named in honor of Richard Montgomery, an American Revolutionary War general killed in 1775 at the Battle of Quebec. The county is part of the Mohawk Valley region of the state.

The county is part of the Albany-Schenectady-Troy combined statistical area.

Historically occupied by the Mohawk people, one of the original Five Nations of the Iroquois Confederacy, the county was created in 1772 during the period of British colonial rule as Tryon County. In 1784, after the Americans gained independence in the War, it was renamed Montgomery County for one of the heroes.

Montgomery County comprises the Amsterdam, NY micropolitan statistical area. The county borders the north and south banks of the Mohawk River.