A public toilet, restroom, public bathroom or washroom is a room or small building with toilets and sinks for use by the general public. The facilities are available to customers, travelers, employees of a business, school pupils or prisoners and are commonly separated into male and female toilets, although some are unisex, especially for small or single-occupancy public toilets, public toilets are sometimes accessible to people with disabilities. Depending on the culture, there may be varying degrees of separation between males and females and different levels of privacy. Typically, the entire room, or a stall or cubicle containing a toilet, is lockable. Urinals, if present in a male toilet, are typically mounted on a wall with or without a divider between them. Local authorities or commercial businesses may provide public toilet facilities. Some are unattended while others are staffed by an attendant. In many cultures, it is customary to tip the attendant, especially if they provide a specific service, such as might be the case at upscale nightclubs or restaurants.

A bathroom is a room in which people wash their bodies or parts of their bodies. It can contain one or more of the following plumbing fixtures: a shower, a bathtub, a bidet, and a sink. The inclusion of a toilet is common. There are also specific toilet rooms, only containing a toilet, which in North American English tend to be called "bathrooms", "powder rooms" or "washrooms", as euphemisms to conceal their actual purpose, while they in British and Irish English are known as just "toilets" or possibly "cloakrooms" - but also as "lavatories" when they are public.