MidAmerica Orchid Congress
- An organization of orchid societies in the central U.S. sponsoring bi-annual shows. List of officers and contacts.
- http://midamericanorchids.org/

Illowa Orchid Society
- Meets in Moline, Illinois. Information about meetings and shows, photos, and conservation committee activities.
- http://www.netexpress.net/~whitbrits/illowa.htm

Michiana Orchid Society
- Meets in South Bend. Includes newsletters, an orchid handbook, photos from shows, and officer lineup.
- http://community.michiana.org/orchid/

Northwest Orchid Society
- Includes membership application, photographs, meeting schedules and newsletters.
- http://www.nwos.org

SouthWest Regional Orchid Growers' Association
- Association for orchid enthusiasts in the Southwestern US. Discussion forum, newsletters, information about events, native species, and alphabetical listing of hybrids and species.
- http://www.swroga.org/

Cymbidium Society Of America
- Dedicated to the culture and propagation of cymbidiums, paphiopedilums and other cool growing orchids. Includes membership information and a list of branch societies.
- http://www.cymbidium.org/