Harmony is an unincorporated community and census-designated place in McHenry County, Illinois, United States.

Harmony is located on U.S. Route 20, 5 miles (8.0 km) west-southwest of Huntley.

It was named a CDP before the 2020 census, at which time it had a population of 20.

[3] Harmony first appeared as a census designated place in the 2020 U.S.

This McHenry County, Illinois location article is a stub.