| Organization | |
| Golden State Bonsai Federation (includes comprehensive list of California Bonsai Clubs) | http://www.gsbf-bonsai.org |
| American Bonsai Society | http://.www.absbonsai.org |
| National Bonsai Foundation | http://www.bonsai-nbf.org |
| Bonsai Clubs International | http://www.bonsai-bci.com |
| Kofukai (Orange County) | http://kofukai.org |