|Elevation||938 ft (286 m)|
|Time zone||Central (CST) (UTC-6)|
|• Summer (DST)||CDT (UTC-5)|
|Area code(s)||815 & 779|
|GNIS feature ID||416644|
Ridgefield is an unincorporated community in McHenry County, Illinois, United States. Ridgefield is 3 miles (4.8 km) northwest of Crystal Lake. Ridgefield hosts a small number of antique shops in a small crossroads business district. Ridgefield also has a large grain storage facility and a retail hardware store.
- U.S. Geological Survey Geographic Names Information System: Ridgefield, Illinois
- "McHenry County". Jim Forte Postal History. Retrieved 26 March 2015.
- Chicago and North Western Railway Company (1908). A History of the Origin of the Place Names Connected with the Chicago & North Western and Chicago, St. Paul, Minneapolis & Omaha Railways. p. 118.
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