Rensselaer, NY is a city located in Rensselaer County, New York and has a land area of 18.32 square miles (47.45 km2). The water area for the city is 0.58 square miles or 1.50 km2. There is one unique zip code in Rensselaer, New York and it is 12144. The area code(s) for Rensselaer is 518.
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