In 2003, there were about 662 regional, national, and international organizations within the state. Among the organizations headquartered in South Dakota are the National Buffalo Association, Custer; Federal Court Clerks Association and Evangelical Lutheran Good Samaritan Society, Sioux Falls); and the National Trail Council, Brookings.
There are several organizations focusing on the local and national interests of Native Americans. These include the Association of Community Tribal Schools, the Association on American Indian Affairs, and the Lakota Student Alliance. The South Dakota State Historical Society is located in Pierre. There are a number of municipal and county historical societies as well. There are also several local arts councils. Environmental groups include the Keep South Dakota Green Association and the South Dakota Wildlife Federation.