With a population of around 9,500 people, Washington Township is a township in Bergen County in New Jersey and is spread over an area of 3 square miles. The township was created by an act of the New Jersey Legislature after incorporating the territories of Hackensack River and Saddle River, which were once parts of Harrington Township.

Named after erstwhile USA president George Washington, Washington Township is present in the northern part of Bergen County and some 15 miles away from New York City. It is surrounded by several lakes such as Lake Tappan, Schlegel Lake, Musquapsink Brook, Oradell Reservoir, Woodcliff Lake Reservoir and Pascack Brook. Washington Township also shares its borders with other boroughs of Bergen County, such as Ho-Ho-Kus, Emerson, Hillsdale, Saddle River, Paramus, Westwood and Ridgewood.

The colonization of Washington Park, with the development of residential places, started after the conclusion of the Civil War when communities started establishing in the various parts of New Jersey real estate in this town, near the railroad stations of New York and New Jersey. Given its location within the Pascack Valley of north-central Bergen County, there are several hills and wooded wetlands in and around Washington Park.