Ernest Campbell Mossner (October 22, 1907 – August 5, 1986) was a professor of English at the University of Texas at Austin and biographer of the Scottish philosopher, essayist and historian David Hume (1711–1776).
He taught briefly at the City College of New York, and Columbia before joining the English faculty at Syracuse University in 1937.
His scholarship was interrupted during World War II, when he worked for the Bureau of the Budget and served in the U.S. Army.
Mossner was a member of Phi Beta Kappa, The Modern Humanities Research Association, The International Association of University Professors of English, The Texas Institute of Letters, the advisory board of the Augustan Reprint Society, the South Central Modern Language Association, the Society of American Historians, and the Fortnightly Club of Austin.
David Campbell Mossner, the only child of Ernest and Carolyn, was born on October 2, 1946, and died in Vietnam on June 1, 1970.