Definition of Nassau county, new york

There is also a Town of Nassau in Rensselaer County.

Nassau County is a suburban county in the New York Metropolitan Area east of New York City in the U.S. state of New York. As of the 2000 census, the population was 1,334,544. The name of the county comes from an old name for Long Island, which was at one time named Nassau, after William of Nassau, Prince of Orange (who later became King William III of England.) The county colors, orange and blue, are also the colors of the House of Orange. Nassau County's county seat is Mineola.