Ridgewood is an unincorporated community and census-designated place in Will County, Illinois, United States. It is northwest of the center of the county, bordered to the east and west by the city of Joliet. U.S. Route 30 runs along the southern edge of the CDP, leading west 2 miles to the center of Joliet and east 3 miles to Interstate 80. Ridgewood was first listed as a CDP prior to the 2020 census.