A teahouse or tearoom is an establishment which primarily serves tea and other light refreshments. A tea room may be a room set aside in a hotel, especially for serving afternoon tea, or may be an establishment that only serves cream teas. Although the function of a tearoom may vary according to the circumstance or country, teahouses often serve as centers of social interaction, like coffeehouses.

Catherine Cranston, widely known as Kate Cranston or Miss Cranston, was a leading figure in the development of tea rooms. She is nowadays chiefly remembered as a major patron of Charles Rennie Mackintosh and Margaret MacDonald, in Glasgow, Scotland. The name of Miss Cranston's Tea Rooms lives on in reminiscences of Glasgow in its heyday.