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.

Ridgefield also has a large grain storage facility and a retail hardware store.

Metra commuter trains pass through Ridgefield on their way to Chicago from Woodstock, Illinois without stopping, though there are currently shelved plans to build a station here.

This McHenry County, Illinois location article is a stub.