A bedsit, bedsitter, or bed-sitting room is a form of accommodation common in some parts of the United Kingdom which consists of a single room per occupant with all occupants typically sharing a bathroom. Bedsits are included in a legal category of dwellings referred to as houses in multiple occupation (HMO).

Bedsits arose from the subdivision of larger dwellings into low-cost accommodation at low conversion cost. In the UK, a growing desire for personal independence after World War II led to a reduced demand for traditional boarding houses with communal dining. Bedsits are often occupied by young single people, students, those unable to purchase their own properties, or those whose occupation is of a transitory nature; the cost is typically lower than for other types of property. Someone whose employment is a long distance from their home may sometimes rent a bedsit to reduce the cost and inconvenience of daily travel.