Donald Alywn Innis, (born in 1931 in Olean, New York), is an American architect based in San Diego, California. Innis is also an inventor and engineer and has pioneered the idea of floating real estate, specifically the notion of a floating airport using pneumatic stabilized platform (PSP) technology which he has developed and patented through his company, Float Incorporated. Innis designed several notable San Diego landmarks, including the 1970s remodeling of the San Diego Broadway Pier (one of the first pier designs to make use of significant above water landscaping and greenery), the master plan for the San Diego Embarcadero, and Terminal One of the San Diego International airport. He is a long-standing member of the American Institute of Architects.