Rensselaer Falls is a village located in St. Lawrence County, New York, USA. As of the 2000 census, the village had a total population of 337. The current name came from mill owner Henry Van Rensselaer. Rensselaer Falls apartments for rent comparison page shows most up to date rent information on Rensselaer Falls apartments and houses. Rent information is obtained from multiple rental sources but we cannot guarantee their accuracy.