Ringwood 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 11,735, a decrease of 493 from the 2010 census count of 12,228, which in turn reflected a decrease of 168 from the 12,396 counted in the 2000 census. It is the home of Ringwood State Park which contains the New Jersey Botanical Garden at Skylands, the Shepherd Lake Recreation Area and historic Ringwood Manor.