Where to Find Agate in Illinois
Illinois has 5 mapped collecting spots that report agate, spread across 4 counties. The largest share sits in Alexander County County with 2 spots. 5 of the spots are on land mapped as publicly accessible.
Map of 5 agate collecting spots in Illinois
Best counties for agate in Illinois
Ranked by the number of mapped agate spots. County links open the full rockhounding page for that county.
- Alexander County2 spots
- Hancock County1 spot
- Henry County1 spot
- Rock Island County1 spot
Every agate spot we track in Illinois
Sorted by county. Coordinates open in Google Maps.
| Spot | County | Minerals | Coordinates | Access |
|---|---|---|---|---|
| FayvilleThebes Road | Alexander County | 37.1986, -89.4522 | Public | |
| ThebesOld Route 3 | Alexander County | 37.2393, -89.4422 | Public | |
| HamiltonSouth 9th Street | Hancock County | 40.3872, -91.3462 | Public | |
| Bishop HillCemetary Street | Henry County | 41.2051, -90.1152 | Public | |
| CordovaRiver Road North | Rock Island County | 41.7160, -90.3112 | Public |
Before you go
Read the agate identification guide so you know what a keeper looks like in the field: Agate in the encyclopedia.
Agate in Illinois FAQ
Where can you find agate in Illinois?+
The mapped spots concentrate in Alexander County County, Hancock County County, and Henry County County. Every spot on this page appears on the map above with coordinates and access notes.
How many agate spots are mapped in Illinois?+
5 spots across 4 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 agate 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 agate
More minerals to hunt in Illinois
Hunt agate 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.
