CooperationWorks! is a network of centers that provide technical assistance to cooperatives, with a focus on the rural U.S. Its members serve most states in the US.

National Cooperative Bank provides financial services to co-ops.

National Cooperative Business Association is the apex organization for co-ops in the U.S.

North American Students of Cooperation focuses on housing and student cooperatives.

Information about starting cooperatives

University of Wisconsin Center for Cooperatives

USDA Rural Development

Cooperative organizations in the United States

U.S. Federation of Worker Cooperatives

National Cooperative Business Association

North American Students of Cooperation

Federation of Southern Cooperatives

Network of Bay Area Worker Cooperatives

National Cooperative Grocers' Association

Federation of Workplace Democracies in Minnesota

Liga de Cooperativas de Puerto Rico  

International cooperative organizations

International Cooperative Alliance

CICOPA (the global federation of worker cooperatives)

Mondragon (Euzkadi/Spain)

Confederazione Cooperative (Italy)

Co-op Online (U.K.):

Co-operative Society (U.K.)

Japanese Consumer Cooperatives Union

Japan Workers' Cooperative Union

Seikatsu Club (Japan)

Canadian Cooperative Association

Canadian Worker Cooperative Federation