The Rochdale Pioneers opened their store (pictured) in Rochdale, England, forming the basis for the modern co-operative movement.

The Rochdale Society of Equitable Pioneers, founded in 1844, was an early consumers' co-operative, and one of the first to pay a patronage dividend, forming the basis for the modern co-operative movement. Although other co-operatives preceded it, the Rochdale Pioneers co-operative became the prototype for societies in Great Britain. The Rochdale Pioneers are most famous for designing the Rochdale Principles, a set of principles of co-operation, which provide the foundation for the principles on which co-ops around the world operate to this day. The model the Rochdale Pioneers used is a focus of study within co-operative economics.

Rochdale is a town in Greater Manchester, England, and the administrative centre of the Metropolitan Borough of Rochdale. In the 2021 Census, the town had a population of 111,261, compared to 223,773 for the wider borough. Rochdale is in the foothills of the South Pennines and lies in the dale (valley) of the River Roch, 5 miles (8 km) north-west of Oldham and 10 miles (16 km) north-east of Manchester.

The history of the cooperative movement concerns the origins and history of cooperatives across the world. Although cooperative arrangements, such as mutual insurance, and principles of cooperation existed long before, the cooperative movement began with the application of cooperative principles to business organization.