A tuck shop is a small retailer located either within or close-to the grounds of a school, hospital, apartment complex, or other similar facility. In traditional British usage, tuck shops are associated chiefly with the sale of confectionery, sweets, or snacks and are common at private ('fee-paying') schools. Tuck shops located within a campus are often the only place where monetary transactions may be made by students. As such, they may also sell items of stationery or other related school items. In some regions, the words 'tuck shop' may be interchangeable with a 'canteen'. The term is used in the UK, Ireland, Australia, New Zealand, South Africa, Canada, Nigeria, Pakistan, India, Jamaica, Hong Kong, Botswana, The Bahamas and in other parts of the former British Empire.

In Australia, at youth clubs, campsites, and schools, the tuck shop is mainly staffed by volunteers from the community, which may include students, parents and, in the case of clubs, its members. The term is also used in Indian boarding schools. In Canada, summer camps often have tuck shops for the same reason, to allow campers to buy small items while away from home. Some hospitals in Canada have tuck shops too, though now it's more common for them to be called gift shops.

Tuck shops in a long-term care facility typically sell personal hygiene items such as razors, soap, and shampoo.