The Minnesota Peony Society
- Brief society overview, and articles on tree peonies, species peonies, and Minnesota peony personalities.
- http://www.mnpeony.org/

The Peony Society
- Organization based in the UK to promote and share the enjoyment of peonies as garden plants. Site includes bibliography, lists of suppliers and gardens, and informational pages on the plants.
- http://www.paeonia.org/

Pacific Northwest Peony Society
- Most events take place in Oregon. Information about membership, meetings and events, and photos from flower shows.
- http://www.pnwpeony.org/

Canadian Peony Society
- Site offers newsletter, seed exchange and root sale information, photo galleries, and a collection of articles by members. [English/French]
- http://www.peony.ca/

Prairie Peony Society
- Summary page on this society, which meets in Regina (Saskatchewan).
- http://www.icangarden.com/clubs/Regina%20PS/

Heartland Peony Society
- Midwest club for peony enthusiasts. Educational information on peonies and specific information on the society.
- http://www.peonies.org/

American Peony Society
- Information about membership and events, a primer on botanical distinctions, articles on various topics, and a photo gallery of hybrids developed by members.
- http://www.americanpeonysociety.org/