Warren Platner was an American architect and designer known primarily for his mid-century modernist interior design and furniture. 

Platner was born in 1919 in Baltimore, Maryland, and studied architecture at Cornell University. Beginning in the 1950s, he was responsible for the interiors in numerous landmark buildings, including the Ford Foundation building in Manhattan and the Windows of the World restaurant at the top of the World Trade Center, which opened in 1976. Platner worked in the architecture firms of Kevin Roche (architect of the Ford Foundation building) and Eero Saarinen before establishing his own studio in 1965. In 1966, he introduced a line of furniture for Knoll that has been in continuous production since its release. Platner died in 2006.