Birgit Cold (born 1936) is a Danish-born Norwegian architect and educator.
She established her own practice in Trondheim together with Tore Brantenberg and Edvard Hiorthøy in 1964 and became a professor at the Norwegian University of Science and Technology in 1985.
Her main areas of interest include the school environment and concern for well-being and health.
Cold is also known for her sketching which she often uses to express her understanding of architecture.