Pacific Rim Dahlia Society
- Includes events, photographs and culture tips.
- http://www.dahlias.ca

Minnesota Dahlia Society
- Membership information, schedule of events and show results.
- http://www.minnesotadahliasociety.org/

Alabama Dahlia Society
- Provides contact information and schedule.
- http://www.dahliasocietyofalabama.org/

The National Dahlia Society
- The governing body for the promotion of dahlias in the UK, regulating shows, classification, and judging. Information about membership and events, as well as about dahlias and their cultivation.
- http://www.dahlia-nds.co.uk/

Fraser Valley Dahlia Society
- Presents photographs, news and event schedule.
- http://members.shaw.ca/fvds/

Puget Sound Dahlia Association
- Provides event schedule, publications, photographs and culture information.
- http://www.pugetsounddahlias.org/

John E. Stowell Dahlia Society
- Northern California group provides event schedule, photographs and membership information.
- http://www.jesdahlias.org/

Mid Island Dahlia Society
- Membership information and comprehensive growing instructions.
- http://www.midislanddahlia.com/

Snohomish County Dahlia Society
- Contains a variety of dahlia topics, including pictures and information about growing and caring for dahlias.
- http://www.scdahlias.org/

American Dahlia Society
- Includes directory of local groups, classification guide, resources and photographs.
- http://www.dahlia.org/

Doing Dahlias
- The Colorado Dahlia Society. Articles on choosing and growing dahlias, photo galleries and membership information.
- http://www.dahlias.net/