David Carlisle Humphreys (October 14, 1855 – January 10, 1921) was an engineer, architect, cartographer, hydrographer, inventor, educator and co-founder of Omicron Delta Kappa, a national leadership honor society, with chapters at more than three hundred college campuses. He served as Dean of the School of Applied Science at Washington and Lee University in Lexington, Virginia from 1904 to 1912; and Dean of the School of Engineering from 1912 until his death in 1921.