In 2003, there were about 1,461 regional, national, and international organizations within the state. Among the organizations headquartered in Oklahoma are the Football Writers Association of America, Edmond; the International Professional Rodeo Association, Pauls Valley; the National Judges Association, Maud; the National Pigeon Association, Newalla; the Amateur Softball Association of America and the International Softball Federation, both in Oklahoma City; and the American Association of Petroleum Geologists, the Gas Processors Association, and the US Jaycees, all located in Tulsa.
Organizations focusing on the arts include the American Choral Directors Association and Sweet Adelines International. Historical and cultural organizations include the Cherokee National Historical Society, the Institute of the Great Plains, and the National Cowboy and Western Heritage Museum. Organizations dedicated to the rights and welfare of Native Americans include the American Indian Institute, American Indian Research and Development, and the Institute for the Development of Indian Law.