Rensselaer Ny Zip Code, Demographics and population information by ZIP code in Rensselaer County, NY. Area code: 518. Find the 5-digit ZIP codes for Rensselaer, New York and nearby areas. Use the interactive map or the list of codes to locate the correct postal code for your mail delivery. Rensselaer (/ rɛnsəˈlɪər /) is a city in Rensselaer County, New York, United States, and is located on the east side of the Hudson River, opposite Albany and on the western border of Rensselaer County. Rensselaer County NY Zip Code Lookup and List Below is a list of Rensselaer County NY zip codes. Use our address lookup or code list to find the correct 5-digit or 9-digit (ZIP+4) code for your postal mails destination. Rensselaer Zip Code Map, New York shows all the zip codes of Rensselaer County. Rensselaer ZIP Code List — Rensselaer County, NY There is one unique ZIP code in Rensselaer, New York and it is 12144. This page shows a map with an overlay of Zip Codes for Rensselaer, Rensselaer County, New York. 54rszy, gr, qrn, kcy, 79, npdc, nr, bsgq, fz, pehet3,