Cornell MacNeil (September 24, 1922 – July 15, 2011) was an American operatic baritone known for his exceptional voice and long career with the Metropolitan Opera, which spanned 642 performances in twenty-six roles. F. Paul Driscoll wrote in Opera News that he "was a great baritone in era of great baritones — Warren, Gobbi, Merrill, Milnes — and in the contemporary press, comparisons to his colleagues were frequent. But MacNeil's performances had singular musical richness, and moral and intellectual complexity that were his alone. MacNeil may have had rivals, but he had no equals."