Elmwood Park is a borough in Bergen County, in the U.S. state of New Jersey, and is a bedroom suburb located 14 miles from New York City. As of the 2020 United States census, the borough's population was 21,422, an increase of 2,019 from the 2010 census count of 19,403, which in turn reflected an increase of 478 from the 18,925 counted in the 2000 census. Prior to 1916, the area was known as Dundee Lake, a section of Saddle River Township.