Jan Cornelis Rietveld (Utrecht, April 27, 1919 – Amsterdam, December 17, 1986) was a Dutch architect. Rietveld designed many detached large houses, often with a practice room. Apart from the Westereindflat in Amsterdam, no major construction projects were carried out by him. In terms of style, his work has similarities with Nieuwe Bouwen and the work of his father Gerrit Rietveld.

Biography
Jan Rietveld was a son of designer and architect Gerrit Rietveld (1888-1964). He was a brother of the painter Bep Rietveld, the designer Wim Rietveld and the furniture designer Gerrit Rietveld Jr. He attended evening classes at the Academy of Architecture in Amsterdam, where he graduated in 1949 with Bernard Bijvoet. At the beginning of his career, he worked at the architectural firms Van Tijen & Maaskant, Brinkman & Van den Broek, and with his father. In 1947 he started as an independent architect. From 1947 to 1959 he was involved in the Amsterdam architectural group De 8 and was also a member of its Rotterdam counterpart De Opbouw for a short time.
He was a teacher of Interior Design at the Enschede Art Academy (1951-1955) and a teacher of Interior Design and Architectural Design at the Gerrit Rietveld Academy in Amsterdam (1955-1984). In 1970 he became an extraordinary professor at the Delft University of Technology.

Style
In terms of style, his work has similarities with Nieuwe Bouwen and the work of his father. He dealt loosely with existing architectural theories and worked from the practice of design. According to him, the external form of buildings depended mainly on the wishes of clients. Unlike many architects of his generation, he liked to work with natural, traditional building materials, such as brick. He also did not adhere to rectangularity in his designs.