In 2003, there were about 3,195 regional, national, and international organizations within the state.
The State Historical Society of Wisconsin, founded in 1846, is one of the largest organizations of its kind. It has a museum, a library, and research collections in Madison and is a prominent publisher of historical articles and books. There are several city and county historical societies throughout the state as well. The Forest Products Research Society, in Madison, has an international membership of about 5,000.
Other national organizations based in Wisconsin include the American Bowling Congress, American Society of Agronomy, Conservation Education Association, Crop Science Society of America, Experimental Aircraft Association, Inter-Varsity Christian Fellowship/USA, the John Birch Society, Master Brewers Association of the Americas, the National Association of Congregational Christian Churches, Model Railroad Industry Association, the Seventh Day Baptist General Conference, the National Funeral Directors Association, the United States Curling Association, Wilderness Watch, and World Council of Credit Unions.