Glens Falls is a city in Warren County, New York, USA. It is part of the Glens Falls, New York Metropolitan Statistical Area. The population was 14,354 at the 2000 census. The name is derived from the large waterfall in the Hudson River at the southern base of the city. Glens Falls apartments for rent comparison page shows most up to date rent information on Glens Falls apartments and houses. Rent information is obtained from multiple rental sources but we cannot guarantee their accuracy.