A charity shop (British English), thrift shop or thrift store (American English and Canadian English, also includes for-profit stores such as Savers) or opportunity shop or op-shop (Australian English and New Zealand English) is a retail establishment run by a charitable organization to raise money. Charity shops are a type of social enterprise. They sell mainly used goods such as clothing, books, music albums, shoes, DVDs, toys, and furniture donated by members of the public, and are often staffed by volunteers. Because the items for sale were obtained for free, and business costs are low, the items can be sold at competitive prices. After costs are paid, all remaining income from the sales is used in accord with the organization's stated charitable purpose. Costs include purchase and/or depreciation of fixtures (clothing racks, bookshelves, counters, etc.), operating costs (maintenance, municipal service fees, electricity, heat, telephone, limited advertising) and the building lease or mortgage.

Some charity shops also offer for sale a limited amount of edibles such as soda drinks, water, ice cream, snacks, and candy. When available, these items are usually near the stores' cashiers.