Prairie Grove is a village in McHenry County, Illinois, United States, first incorporated in 1973.

There were 308 housing units at an average density of 66.5 per square mile (25.7/km2).

7.9% of all households were made up of individuals, and 2.3% had someone living alone who was 65 years of age or older.

None of the families and 1.3% of the population were living below the poverty line, including no under eighteens and none of those over 64.

[15] The Union Pacific Northwest Line has plans for a Station in Prairie Grove to expand service on the McHenry Branch.