Fox River Grove (FRG) is a village in Algonquin Township, McHenry County and Cuba Township, Lake County, Illinois, United States. As per 2020 census, the population was 4,702. In 1919, the village of Fox River Grove was officially incorporated, becoming the ninth village in McHenry County. The Grove is situated along the southern shore of the Fox River. Residents refer to themselves as "Grovers."
Long before the arrival of Europeans, Native Americans called the land within Fox River Grove home. The Ojibwe (also known as Chippewa) people continued to winter in the Fox River Valley into the 1860s. The women traded beadwork and purses with local settlers while the men trapped muskrat and mink, selling the pelts in nearby Barrington, Illinois. The area's proximity to Northwest Highway (Route 14), a major military and trade road, enabled such commerce to thrive. The men also made fence posts for local farmers and would "spear fish at night usi