Fox River Grove is a community located in the U.S. state of Illinois. It is both Lake and McHenry Counties in Cuba Township and Algonquin Township respectively. It has a total area of 1.74 square miles at 42°11′44″N 88°13′0″W. Fox River Grove was founded in 1919. As of the 2010 census data, it had a total population of 4,854. The population density was 2,671.45/sq mi. Estimated per capita income in 2016 was $27,535. It has Zip code 60021.