United States

NexStar 50 Club

Shows data table of observed deep sky and planetary objects including moon features. Also includes list of members and reference works.

Sky Watch

Comprehensive list of all things astronomy. Find clubs, links, galleries, resources, books, and articles.

The Astronomical League

Composed of over two hundred and forty local amateur astronomical societies from all across the United States. http://www.facebook.com/pages/Astronomical-League/210859552336878

Urban Observing Club

Contains details about the policies, membership privileges, merchandise and forthcoming activities of the group.