Ardsley is a village in Westchester County, New York, United States. The population was 4,269 at the 2000 census. The Village of Ardsley is located in the Town of Greenburgh. The Ardsley post office serves the entire village of Ardsley plus some nearby unincorporated sections of the Town of Greenburgh. The Ardsley Union Free School District consists of the entire Village of Ardsley plus parts of the Village of Dobbs Ferry and Town of Greenburgh. Every location served by the Ardsley post office is in the Ardsley Union Free School District. The current mayor of Ardsley is Jay Leon.