Rensselaer may refer to:
Places Rensselaer, Indiana, a city Rensselaer (Amtrak station), serving the city Rensselaer, Missouri, a village Rensselaer County, New York Rensselaer, New York, a city in Rensselaer County Albany–Rensselaer station, Amtrak station serving the Albany, New York area. Rensselaer Falls, New York, a village in St. Lawrence County Rensselaerville, New York, a town in Albany County Manor of Rensselaerswyck, the Van Rensselaer family's estate during colonial times
People Van Rensselaer (surname) Rensselaer R. Bigelow (1848–1907), justice of the Supreme Court of Nevada Rensselaer Morse Lewis (1820-1888), Wisconsin state legislator Rensselaer Nelson (1826-1904), U.S. federal judge Rensselaer Westerlo (1776–1851), U.S. Congressman from New York Bret Rensselaer, an American-born, British spy in the Bernard Samson novels
Other Rensselaer Polytechnic Institute, a university in Troy, New York
See also Van Rensselaer (disambiguation)