In 2003, there were about 5,513 regional, national, and international organizations within the state.
Philadelphia is the home for two major service organizations: Big Brothers/Big Sisters of America and the Grand United Order of Odd Fellows. Cultural and educational organizations in that city include the American Academy of Political and Social Science, the Academy of Natural Sciences, the American Philosophical Society, and Middle States Association of Colleges and Schools. The Association for Children with Learning Disabilities is located in Pittsburgh, the College Placement Council in Bethlehem, and the American Philatelic Society in State College. Also in State College is the Environmental Coalition on Nuclear Power. The Society for Animal Rights, a humane organization, is in Clarks Summit.
State arts organizations include Dance Theatre of Pennsylvania, the Pittsburgh Center for the Arts, the Folk Heritage Institute. State environmental organizations include Preservation Pennsylvania and the Rodale Institute.
Commercial and trade groups in the state include the American Mushroom Institute, Kennett Square; Insurance Institute of America, Malvern; the American College of Physicians–American Society of Internal Medicine, Philadelphia; and the Society of Automotive Engineers, Warrendale. The Gray Panthers, a senior citizens' activist group, and Women's Strike for Peace are in Philadelphia. Valley Forge is the home of the Patriotic Order of the Sons of America.
Among the many sports organizations headquartered in Pennsylvania are the US Squash Racquets Association, in Bala-Cynwyd; National Trotting and Pacing Association, Hanover; Pop Warner Football and US Rowing Association, Philadelphia; and Little League Baseball, Williamsport. The Major League Umpires Association is also based in the state.
The Jewish Publication Society is based in Philadelphia. The Mennonite Central Committee, a major international relief and service organization, is based in Akron.