- American Dahlia Society
 - A worldwide dahlia society. - Colorado Dahlia Society
- Contains society info, garden photos, tips on growing dahlias, events, and more.
- Comox Valley Dahlia Society
- Features a message board, club calendar, photos, and more.
- Dahlia Society of Alabama
- Fraser Valley Dahlia Society
- Contains members, meeting information, and links.
- Greater Philadelphia Dahlia Society
- Hosts an annual show each September at Longwood Gardens in Kennett Square. Includes show rules, member information, and links.
- John E. Stowell Dahlia Society
- Offers information on public events, work parties, and the display garden in San Jose's Guadalupe River Park and Gardens.
- Michigan Dahlia Association
- Offers show results, photos, and articles.
- Midwest Dahlia Conference
- Serving dahlia societies in the Midwestern states. Includes upcoming events and links to participating organisations.
- Minnesota Dahlia Society
- Includes upcoming events, results from previous shows, and newsletter.
- National Capital Dahlia Society
- Promotes growing dahlias with an emphasis upon growers in the metro D.C. area. Includes calendar, member resources, and information on the Mid-Atlantic Trial Garden.
- North West Dahlia Society
- Includes growing tips, events calendar, and the annual show.
- Pacific Rim Dahlia Society
- Includes show results and growing guide.
- Portland Dahlia Society
- Offers member information, show results, and links.
- Puget Sound Dahlia Association
- Includes an online brochure on growing dahlias, club information, and links.
- Quebec Dahlia Society
- Offers general information, photos, and events calendar. Also in French.
- Snohomish County Dahlia Society
- Contains a variety of dahlia topics, including pictures and information about growing and caring for them.
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