Bloomingdale is a borough in Passaic County, in the U.S. state of New Jersey. As of the 2020 United States census, the borough's population was 7,777, an increase of 121 from the 2010 census count of 7,656, which in turn reflected an increase of 46 from the 7,610 counted in the 2000 census. Bloomingdale is home to four membership lake communities including Glen Wild Lake, Lake Iosco, Kampfe Lake, and Morse Lakes; a suburban neighborhood featuring an upper and lower lake.