Haraden Pratt (July 18, 1891 - August 1, 1969) was a noted American electrical engineer and radio pioneer. Pratt was born in San Francisco, California, where his parents were telegraph operators. He learned Morse code when young and worked briefly as a shipboard wireless operator before entering the University of California (Class of 1914). After graduation, he joined the American Marconi Company and helped to install and operate its 300-kilowatt trans-Pacific radio station at Bolinas, California and its companion receiver station in Marshall, California.