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Diablo Numismatic Society

Welcome To The Diablo Numismatic Society

We are the oldest coin collecting club in the Contra Costa County of California, having been established in 1960.

We currently have over 70 members and meet at the Clayton Community Library on the third Thursday of every month.



David Davis, Jr.

(925) 686-5115


The Diablo Numismatic Society meets every Third Thursday of the month at 7:00 pm.

Our monthly meeting location is at

Clayton Library

6125 Clayton Rd.

Clayton, CA 94517

To find our meeting room, enter the library through the main doors and go immediately to the left.