AAVSO – http://www.aavso.org
Amateur Observers’ Society of New York – http://www.aosny.org
Astronomical Assoc. of So. Illinois – http://sites.google.com/site/astronomyinsouthernillinois/
Astronomy Enthusiasts of Lancaster County (PA) – http://www.aelc.us
Astronomical Society of Eastern Missouri – http://www.asemonline.org
Astronomical Society of Kansas City – http://askc.org
Astronomical Society of NW Arkansas – http://www.astroleague.org/societies/astronomical-society-nw-arkansas
Back Bay Amateur Astronomers, VA – http://www.backbayastro.org
The Cedar Amateur Astronomers (NE) – http://www.cedar-astronomers.org (BUT… this one looks like Cedar Rapids IA)
Chapel Hill Astronomical and Observational Society (NC) – http://www.chaosastro.com/
Charlotte Amateur Astronomers Club – http://www.charlotteastronomers.org
Chicago Astronomical Society – http://www.chicagoastro.org
Cincinnati Astronomical Society – http://www.cinastro.org
City Lights Astronomical Society for Students (CLASS) – http://www.classusa.org
Delaware Valley Amateur Astronomers (PA) – http://www.dvaa.org
Des Moines Astronomical Society – http://www.dmasonline.org
Door Peninsula Astronomical Society (WI) – http://www.doorastronomy.org
Fargo-Moorhead Astronomy Club – http://www.fmastronomy.com
Flint River Astronomy Club, GA – http://www.flintriverastronomy.org
Hellenic Astronomical Union, Greece – http://www.helas.gr
Houston Astronomical Society – http://www.astronomyhouston.org
Illinois SkyWatch – http://www.iskywatch.com
Kankakee Area Stargazers – http://kasg.org
Miami Valley Astronomical Society – http://mvas.org
Minnesota Astronomical Society – http://www.mnastro.org
Morris Museum Astronomical Society (NJ) – http://www.mmastrosociety.org
Naperville Astronomical Association – http://www.stargazing.net/naa/
Neville Public Museum Astronomical Society (Green Bay, WI) – http://www.npmas.org
Northeast Wisconsin Stargazers (NEWSTAR) – http://www.new-star.org
Northern Cross Science Foundation – http://www.ncsf.info
Northwest Suburban Astronomers – http://www.nsaclub.org
Popular Astronomy Club (IL) – http://pacastronomy.50megs.com/
Racine Astronomical Society – http://www.rasastro.org
Raleigh Astronomy Club, NC – http://www.raleighastro.org
Roanoke Valley Astronomical Society – http://www.rvasclub.org
Salt Lake Astronomical Society – http://slas.us
Seattle Astronomical Society – http://www.seattleastro.org
Skokie Valley Astronomers – http://skokievalleyastronomers.org
Steele County Astronomical Society – http://minnesotasky.tripod.com
St. Louis Astronomical Society – http://www.slasonline.org
Tucson Amateur Astronomy Association – http://tucsonastronomy.org
Tucson Astronomical Society – http://tucsonastronomy.org
Twin City Amateur Astronomers – http://tcaa.us
Wabash Valley Astronomical Society – http://www.stargazing.net/wvas
Warren Astronomical Society – http://www.warrenastro.org, http://www.facebook.com/warrenastro
Wehr Astronomical Society – http://www.wehrastro.org