Monticello, Illinois
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Monticello is a city in and the county seat of Piatt County, Illinois, United States. The population was 5,941 at the 2020 census.
Piatt County Courthouse
Monticello Post Office
Bottle of the Syrup Pepsin Company. It reads Monticello, Illinois on the left side.
Buildings on Charter Street
Robert Allerton Park
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The Robert Allerton Park is a 1,517-acre park, nature center, and conference center located in the rural Piatt County township of Willow Branch, near Monticello, Illinois, on the upper Sangamon River.
Allerton House and Reflecting Pond
The Allerton Natural Area is a National Natural Landmark
One of many sculptures in the park
The Herb Garden