Trout Valley is a village in McHenry County, Illinois, United States. It was incorporated as a village on 19 March 1996. At the 2010 census, the population was at 537.
Maxon Community Developers of Barrington, Illinois, founders and developers of nearby Streamwood, Barrington Woods, Brigadoon, and later Green Valley, Arizona purchased the Curtiss Candy Farms in 1952 from Otto Schnering, founder of the Curtiss Candy Company. The brothers Norm and Don Maxon promptly renamed it Trout Valley after Norman's passion for fly fishing.
The estate was once the private estate of John D. Hertz of Hertz Car Rentals, modeled during the gilded age after English estates complete with riding stables, polo grounds, trout fishing and pheasant hunting. Norman Maxon, an avid outdoorsman, reestablished the trout hatchery and approached National Homes of Lafayette, Indiana to develop Trout Valley as a national showcase for their modular homes. By 1956, Trout Valley won the National Home development of the year and the concept of a homeowners association was conceived by C.E.O. Don Maxon as a way to maintain the integrity of Trout Valley.
Trout Valley was once part of unincorporated McHenry County until it became its own village. The residents attend schools in the Cary School District, and the village itself does not have any of its own schools, fire department, or police department. The land was once a farm owned by John D. Hertz and still contains residual structures from that period of time.