Edward J. Swearingen (born September 1925) in Lockhart, Texas is an aeronautical engineer based in San Antonio, Texas.
Swearingen is notable for developing modifications from existing production aircraft such as the Piper PA-30 Twin Comanche from the Piper PA-24 Comanche single engine series, the Swearingen Merlin turboprop aircraft from the Beech Model 50 Twin Bonanza. Mr.Swearingen also has developed original aircraft designs such as the SX-300 experimental airplane and Sino Swearingen SJ30-2 executive jet.