Contra Costa Coin and Collectibles Show
October 9, 2026 – October 10, 2026
The Contra Costa Coin and Collectibles Show is one of Northern California’s longest-running annual numismatic events, hosted by the Diablo Numismatic Society. Each October, collectors, investors, and dealers gather in Walnut Creek for two full days of buying, selling, trading, and learning about coins, paper money, bullion, medals, tokens, and other historical collectibles. The Diablo Numismatic Society has served the local collecting community since 1960 and continues to promote education and fellowship through this popular annual show.
Whether you’re searching for key-date coins, expanding a world currency collection, investing in precious metals, or bringing in an inherited collection for evaluation, you’ll find experienced dealers and knowledgeable collectors ready to help. The welcoming atmosphere makes this show an excellent destination for both experienced numismatists and first-time collectors. It’s a great opportunity to compare inventory from multiple dealers in one location, learn more about the hobby, and discover unique additions for your collection.
Follow the Contra Costa Coin & Collectibles Show on U.S. Coin Events to receive automatic show reminders, event updates, and see which dealers plan to attend before you arrive.