Sumner is a given name. Notable people with the name include:
Sumner Archibald Cunningham (1843–1913), American Confederate veteran and newspaper editor. Sumner Gerard, American businessman and diplomat, US Ambassador to Jamaica Sumner Paine, 1896 Olympic shooting gold and silver medalist Sumner Chilton Powell, winner of the Pulitzer Prize for History in 1964 Sumner Redstone (or Sumner Murray Rothstein, 1923–2020), Chairman of Viacom Sumner Stone, (born 1945), typeface designer Sumner L. Trussell (1860–1931), judge of the United States Board of Tax Appeals Sumner Welles, (1892–1961), U. S. Undersecretary of State