The Gem Mint Card Show delivers a massive two-day card hunt in the heart of downtown Houston on Saturday, August 8 and Sunday, August 9, 2026, hosted at POST Houston — one of the city's most striking event venues. Free admission plus a landmark location makes this a standout weekend on the August calendar, pairing a serious card show with a destination that is worth the trip on its own.
The vendor floor covers the full spread of the modern hobby. Sports cards anchor plenty of tables, with MLB, NBA, NFL, and NHL singles running from vintage classics through today's chase rookies, autographs, and numbered parallels, plus graded slabs from PSA, SGC, and CGC in the display cases. The TCG side is equally strong: Pokémon leads with singles, sealed, and vintage, joined by One Piece, Yu-Gi-Oh!, and other games that have become fixtures of Houston's downtown show scene. Mixed collectibles — memorabilia, Funko Pops, comics, and pop-culture pieces — fill the gaps, making this one of the more browsable shows in town for attendees who collect across categories.
Hours run 10:00 AM to 7:00 PM both days, a nine-hour window that ranks among the longest of any Houston card show and takes real pressure off the schedule. Admission is free on both Saturday and Sunday with no published VIP tier, so the door costs nothing regardless of when you arrive. All ages are welcome.
POST Houston occupies the transformed Barbara Jordan Post Office building at 401 Franklin Street downtown, steps from the Theater District. Paid garage and surface parking are available at and around the venue — expect downtown rates, and consider rideshare on a busy Saturday. The building itself is half the fun: POST's international food hall means lunch options from a dozen kitchens without leaving the premises, and the rooftop park offers skyline views for a mid-show break. Few card shows anywhere come with amenities like this.
The show fits every collector profile. First-timers and families get a free, atmospheric introduction to the hobby with built-in food and entertainment. Casual collectors can graze the binders and dollar boxes across two full days. Serious buyers should work the display cases early, while traders will find the crowd size generates constant deal flow — downtown shows at POST draw some of the most diverse attendance in the city, which means diverse binders on the other side of the table.
For the best experience, arrive near Saturday's 10:00 AM open for first pick of fresh inventory, and use the long hours to take unhurried second and third laps — prices on the same card can vary widely across a floor this size. Bring cash for negotiating, a want list to stay focused, and a sleeved trade binder if you want in on the action. Sunday evening's final hours are prime time for discounts as vendors pack up.
Event updates and details are tracked on Card Show Dex's Houston calendar at cardshowdex.com/houston.