Ridgefield is an unincorporated community and census-designated place in McHenry County, Illinois, United States. Ridgefield is 3 miles (4.8 km) northwest of Crystal Lake. It was named a CDP before the 2020 census, at which time it had a population of 210.
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History
A post office called Ridgefield was first established in 1858. The community was named from the ridges near the town site.
Demographics
Ridgefield first appeared as a census designated place in the 2020 U.S. census.