Amateur
- 421
- York County Astronomical Society
- Schedule, telescope clinic, public observing, observatory information, and news located at Jacobus.
- 422
- Southern Oregon Skywatchers
- Newsletter, meetings, star parties, educational resources, events, and library located at Medford.
- 424
- Oklahoma City Astronomy Club
- Forum, meetings, star parties, public outreach, newsletter, programs, and library.
- 426
- Astronomy Club of Akron
- Events, meetings, observatory information, resources, photos, and newsletter.
- 427
- Black River Astronomical Society
- Calendar, space news, Clear Sky Clock, FAQ, gallery, articles, newsletter, and club gear located at North Ridgeville.
- 430
- Miami Valley Astronomical Society
- Discussion board, facilities, events, gallery, and newsletter located at Dayton.
- 432
- Wilderness Center Astronomy Club
- Tutorials, news, gallery, and a calendar of events located at Wilmot.
- 433
- Cape Fear Astronomical Society
- Schedule, newsletter, references, and photos located at Wilmington.
- 434
- Amateur Astronomers Association of New York
- Education, observing, newspaper, gallery, and articles located in New York City.
- 435
- Amateur Observers Society of New York
- Meetings, stargazing, moon calendar, gallery, light pollution, library list, and links located at Long Island.
- 438
- Rockland Astronomy Club
- Calendar, special events, newsletter, articles, photography, and classifieds located in Suffern.