Societies:
American Orchid Society
Canadian Orchid Congress
The World Orchid Conference Trust
The Royal Horticultural Society
South African Orchid Council
Australian Orchid Council
Orchid Council Of New Zealand

Native Orchids and Orchid Conservation:
Conserve Native Plants Society Inc.
Native Orchid Conservation Inc.
Native Orchid Conference, Inc.
Orchid Conservation Alliance
Orchid Conservation Coalition
The Orchid Species Preservation Foundation of Alberta
Washington (State) Native Orchids Club
The (UK) Hardy Orchid Society
Orchid Conservation International, UK
Werkgroep Europese Orchideeen/Society for European Orchids
Australasian Native Orchid Society
The Species Orchid Society of Western Australia

Genera/Alliances:
Cymbidium Society of America
International Phalaenopsis Alliance
The Maxillaria Tribe
The Pleurothallid Alliance
The Slipper Orchid Alliance
British Paphiopedilum Society
The Pleurothallid Alliance UK

Links of interest:
Online Orchid Reference
Orchidspecies.com
Orchids Wiki
The Orchid Mall

Africa:
Cape Orchid Society (COS)
Orchid Society of the Northern Transvaal (ONT)

Asia:
Akashi Orchid Society
Morioka Orchid Society
Orchid Society of South East Asia
Perak Orchid Society

Australia & Pacific Region:
Five Dock RSL Orchid Society
Ipoh Orchid Society
Orchid Societies Council of Victoria

Canada:
Central Ontario Orchid Society
Central Vancouver Island Orchid Society
Foothills Orchid Society
Fraser Valley Orchid Society
Kingston Orchid Society
Manitoba Orchid Society
Central Vancouver Island Orchid Society
Les Orchidophiles de Montréal
Les Orchidophiles de Québec
Les Orchidophiles du Saguenay Lac St-Jean
Orchid Society of Nova Scotia
London Orchid Society
Ottawa Orchid Society
Niagara Region Orchid Society
North Okanagan Orchid Society
Okanagan Orchid Society
Orchid Society of Alberta
Orchid Society of the Royal Botanical Gardens
Saskatchewan Orchid Society
Southern Ontario Orchid Society
Toronto Artistic Orchid Association
Vancouver Orchid Society
Victoria Orchid Society
Windsor Orchid Society - La Societé des Orchidophiles de Windsor

Europe:
Austrian Orchid Society
Ceská Orchidejárská Spolecnost (Czech Orchid Society) - COS
Dansk Orchide Klub (Danish Orchid Club)
Deutsche Orchideen-Gesellschaft e.V.
English Orchid Societies
Irish Orchid Society
Les Orchidophiles  réunis de Belgique
De Nederlandse Orchideeën Vereniging /The Dutch Orchid Society
Orchid Society of Great Britain
Saint-Petersburg Orchid Society
Swiss Orchid Society

South America:
Asociación Civil Argentina de Orquideología
Asociación Guatemalteca de Orquideología
Asociacion Mexicana de Orquideologia
Brazilian Orchid Societies
Club Peruano de Orquideas
Trinidad & Tobago Orchid Society