Kiteboarding Associations USA:

Central Coast Kiteboarding Association (California)
http://groups.yahoo.com/group/CCKA

Florida Kitesurfing Association (FKA)
http://fka.kitelife.com/
http://groups.yahoo.com/group/FKSA

Maui Kitesurfing Community (MKC)
http://www.mauikitesurfing.org/

San Diego Kiteboarding Association (SDKA)
http://www.sdka.org/

SoCal KiteBoarding Association (SCKA)
http://www.SCKA.org

United States Kitesurfing Association (USKA)
http://www.uskite.org or http://www.maui.net/~hotwind/uska.html

American Kiteflyers Association
Regular kites. Not Kiteboarding
http://www.aka.kite.org/

International Kiteboarding Associations:

Australian Kitesurfing Association (AKSA)
http://www.aksa.com.au/

British Kitesurfing Association (BKSA)
http://www.kitesurfing.org/

German Kitesurf Association
In German
http://www.kitesurf-association.de/

French Association
http://www.ffvl.fr

Tybee Island GA (TIKA)
http://www.groups.yahoo.com/group/tikakiteboarding

International Kiteboarding Association (IKO)
http://www.ikorg.com