Mahwah is the northernmost and largest municipality by geographic area in Bergen County, in the U.S. state of New Jersey. As of the 2020 United States census, the township's population was 25,487, a decrease of 403 from the 2010 census count of 25,890, which in turn reflected an increase of 1,828 from the 24,062 counted in the 2000 census. From Wikipedia
