RockHoundR

Where to Find Fossils in Illinois

Illinois has 5 mapped collecting spots that report fossils, spread across 5 counties. 5 of the spots are on land mapped as publicly accessible.

Open the full map

Every fossil spot we track in Illinois

Standout fossil spots in Illinois

Hand-picked from the full list above, with the reason each one earns a trip.

Best counties for fossils in Illinois

Ranked by the number of mapped fossil spots. County links open the full rockhounding page for that county.

Fossils in Illinois FAQ

Where can you find fossils in Illinois?+
The mapped spots concentrate in Cook County, Grundy County, and Hancock County. Every spot on this page is on the map, and each spot's own page has its coordinates and access notes.
How many fossil spots are mapped in Illinois?+
5 spots across 5 counties. The RockHoundR app keeps the same spots on an offline map with public land overlays, geology layers, and your saved finds.
Is it legal to collect fossils in Illinois?+
Hand collecting of common rocks and minerals in small amounts for personal use is generally allowed on BLM and U.S. Forest Service land, with limits set by the local field office. National parks, most state parks, and tribal land are closed to collecting. 5 of the 5 mapped spots here sit on land marked public. Always confirm current rules with the managing agency before you dig.

Where else to find fossils

More minerals to hunt in Illinois

Hunt fossils in Illinois with the map in your pocket

RockHoundR puts these spots on an offline map with BLM and Forest Service overlays, geology layers, and a log for your finds.

Download on the App StoreGet it on Google Play