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OKLAHOMA BISON ASSOCIATION To help organize and promote the bison industry in Oklahoma through seminars newsletters and our annual show and sales. Its that time of year get ready for our 2024 Annual Bison Show Sale. For consignment sponsorship and membership inquiries please send us an email and check out the event page for more details To see upcoming and past events visit our OBA Events Page Our Ranches You dont have to own bison to support bison. Check out our current members and Oklahoma ranches.