Where to Find Fossils in Illinois: 32 Mapped Sites
Illinois has 32 documented sites where fossils have been reported, and the best-known are Niota, Sparta, and Bed C. Clear Creek, along south bank and in bed of intermittent stream. Every site is mapped below with GPS coordinates and links to a full report of access and what's been found there. 4 of the 32 sites are on public-access land.
Last updated: — data compiled by the Rockhounding.org Research Team · methodology
Fossils Map: Illinois
All 32 fossils sites in Illinois. Click a pin for the full site report.
Where Fossils Are Found in Illinois
Fossils live in sedimentary rock — limestone, shale, and sandstone. Fresh exposures are everything: roadcuts, creek banks after storms, quarry spoil, and eroding badlands beat weathered outcrop every time.
The richest reported sites in Illinois: Niota, Sparta, Bed C. Clear Creek, along south bank and in bed of intermittent stream, Bellflower, Cahokia.
Of the 32 sites, 4 are public access. Check each site report for current land status before you go.
All Fossils Sites in Illinois
- Niota — Public Access
- Sparta — Public Access
- Bed C. Clear Creek, along south bank and in bed of intermittent stream — Other
- Bellflower — Other
- Cahokia — Other
- Carlinville — Other
- Charleston — Other
- Crotalocrinites-Eucalyptocrinites Association of the Gower Formation — Other
- Drilling on the Herkimer farm, 2.41 km northwest of the center of Mattoon — Other
- Fisher Site — Other
- Glen Park Formation, stratigraphic locality 396 (Poor Farm Hollow Road), Calhoun — Other
- Huber SIte — Other
- LaSalle Limestone Member, Bond Fm., near Pontiac, Livingstone County, IL — Other
- Locality 14. Along stream & dirt road, 1½ miles south of Marigold — Other
- Mazon River — Other
- Mazon River — Public Access
- Naperville — Other
- Near Thebes — Other
- North end of Orchard Creek Exposure, 1.6 km north of Thebes — Other
- Paris mammoth — Other
- Peter's Cave — Other
- Porter Brothers quarry on west side of old Highway 2, 1 mile south of Rockton — Other
- Rock Island — Other
- Salt Spring Hollow, about two miles north of the hollow south of Kritesville — Other
- Shawneetown — Other
- Sinkhole quarry in east part of Evansville, between RR and east-west county road — Other
- St. Joseph — Other
- Tar Springs Loc. 2 — Other
- Tarter Collection 1 — Other
- Terre Haute — Public Access
- Two old quarries just east of the Illinois and Michigan Canal, Romeoville — Other
- Type localitity of Shumway Limestone Member, Matttoon Fm., Shumway Cyclothem — Other
How to Identify Fossils
Look for biological structure the rock around it lacks: shell curves and growth lines, the spongy honeycomb interior of bone, leaf veins, ribbed corals, or the segmented symmetry of a trilobite. Fossils usually contrast with their matrix in color or density. Bone that has mineralized feels heavier than fresh bone and often shows a polished brown-black surface.
Not sure what you found? Try our identification guide →Frequently Asked Questions
Where can I find fossils in Illinois?
Illinois has 32 mapped sites where fossils have been reported. The best-known are Niota, Sparta, and Bed C. Clear Creek, along south bank and in bed of intermittent stream. Each listing on the map above includes GPS coordinates, access type, and what has been found there.
How many fossils sites are mapped in Illinois?
We have 32 documented fossils sites in Illinois, compiled from community submissions and published locality records and reviewed by the Rockhounding.org Research Team.
Is it legal to collect fossils in Illinois?
Casual collecting is generally allowed on BLM and National Forest land for personal, non-commercial use — the standard BLM limit is 25 lbs per day plus one specimen. National parks, monuments, and many state parks prohibit collecting, and private land always requires the owner's permission. Check the site report for each location and verify current land status before you dig.
How do I identify fossil?
Look for biological structure the rock around it lacks: shell curves and growth lines, the spongy honeycomb interior of bone, leaf veins, ribbed corals, or the segmented symmetry of a trilobite. Fossils usually contrast with their matrix in color or density. Bone that has mineralized feels heavier than fresh bone and often shows a polished brown-black surface.
What should I bring to collect fossils?
The basics: a rock hammer, safety glasses, gloves, a bucket or padded bag for specimens, and a GPS app with the coordinates from this page. Add a spray bottle — wetting a stone makes color and banding far easier to judge in the field.
⚠️ Always verify current regulations, weather conditions, and access requirements before visiting any location. Information provided is based on community submissions and may not be current or accurate.
More to Find in Illinois
Data: Paleobiology Database, community submissions — reviewed and approved by the Rockhounding.org Research Team. Always verify current land status, regulations, and access before visiting any site.