A changeroom (regional use), locker room, dressing room (usually in a sports or staff context) or changing room is a room or area designated for changing one's clothes. This seclusion is usually for privacy reasons. Alternatively, it may serve to separate persons of different genders while they are not clothed.

Changerooms may have individual cubicles or stalls, or they may have gender specific open spaces. Sometimes washrooms are also used for changing clothes, since a person can readily change in a toilet cubicle. Many changerooms include washrooms and showers. Sometimes a changeroom exists as a small portion of a washroom. For example, the men's and women's washrooms in Toronto's Dundas Square (which includes a waterplay area) each include a change area which is a blank counter space at the end of a row of sinks. In this case, the facility is primarily a washroom, and its use as a changeroom is minimal, since only a small percentage of users change into bathing suits.

Larger changerooms are usually found at public beaches, or other bathing areas, where most of the space is for changing, and minimal washroom space is included. Beach-style changerooms are often large open rooms with benches against the walls. Some do not have a roof, providing just the barrier necessary to prevent persons outside the changeroom from seeing in.

Types of changerooms

Various types of changerooms exist.

• Locker rooms are usually gender-specific spaces where clothes are changed and stored in lockers. They are often used for swimming or other sporting purposes. They are open spaces with no stalls.
• Fitting rooms, or dressing rooms, are usually small single-user cubicles where a person may try on clothes. These are often found at retail stores where one would want to try on clothes before purchasing them.
• Green rooms and trap rooms are usually mixed-gender backstage or under-stage changing spaces found at theaters and other similar venues.

Locker rooms

Locker rooms are thus named because they provide lockers for the storage of one's belongings. Alternately, they may have a locker room attendant who will keep a person's belongings until they come to retrieve them. Locker rooms are usually open spaces where people change together, but there are separate areas, or separate locker rooms, for men and women. Sometimes they are used in swimming complexes.

Locking devices used in locker rooms have traditionally been key or coin lockers, or lockers that are secured with a combination lock. Newer locker rooms may be automated, with robotic machines to store clothes, with such features as a fingerprint scanner to enroll and for later retrieval. Locker rooms in some waterparks use a microchip equipped wristband. The same wristband that unlocks the lockers can be used to purchase food and drinks and other items in the waterpark.