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 lecture to to themselves as “Grovers”.^{[citation needed]}

Long previously the coming on of Europeans, Native Americans called the estate 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 following local settlers even if the men trapped muskrat and mink, selling the pelts in straightforward Barrington, Illinois. The area’s proximity to Northwest Highway (Route 14), a major military and trade road, enabled such commerce to thrive. The men afterward made fence posts for local farmers and would “spear fish at night using torches attached to the fall of their birchbark canoes.” When spring came, they traveled north to their summer lands in Wisconsin. Between 1816 and 1833, the Ojibwe and U.S. government engaged in friendship talks, resulting in several house cession treaties brute signed. Eventually, all Ojibwe house in Illinois was taken by the federal government. The sudden increase of European-American settlers, coupled later than pressures from the doling out and military, eventually irritated this on the go and detached people to leave the lands that would soon become FRG and relocate west of the Mississippi River.

Pioneers built homesteads in the Fox River Valley between 1830 and 1860. They were originally drawn to the Place that would become Fox River Grove for its scenery and abundance of water. Some of the first settlers to call the Grove house were Czechoslovakian immigrants who—by mannerism of Chicago—established a Bohemian enclave along the Fox River. Attracted to the area for its prime fishing a skin condition and admission to 19th-century entertainment venues, Czechs built cottages along with the village’s hills and upon the river’s southern bank.

In 1850, ethnic-Czech, Frank Opatrny purchased 80 acres (32 ha) of land on the southern shore of the Fox River. Considered to be the patriarch of the village’s founding family, Frank’s son Eman Opatrny put FRG on the map by turning his homestead into the regionally known Picnic Grove.