Teaneck is a township in Bergen County, New Jersey, and is a suburb of New York City. As of the United States 2000 Census, the township population was 39,260. The Census Bureau's 2006 population estimate for the township is 39,610. Teaneck apartments for rent comparison page shows most up to date rent information on Teaneck apartments and houses. Rent information is obtained from multiple rental sources but we cannot guarantee their accuracy.