The Leeds Co-operative Society (Leeds Co-op) was a British independent co-operative society based in Leeds, West Yorkshire, which merged with United Co-operatives in 2007. Leeds Co-op was set up in 1847 and by the 1860s it was the country's largest co-operative society and it became the City's major retailer. Although it started as a flour miller, the society soon diversified into food and non-food retailing. By late 2006 Leeds Co-op was the oldest independent society in Britain and one of the largest businesses in Leeds., a small co-operative and the 19th largest co-operative Society in the United Kingdom, as other societies merged.