William Worcester Churchill was an American artist.
Born in Jamaica Plain, Massachusetts, William Worcester Churchill entered the inaugural class at the Museum of Fine Arts School in Boston in 1877 along with Edward H. Barnard and Charles Henry Hayden. There he studied drawing with Edwin Graves Champney, anatomy with William Rimmer, and painting with Otto Grundmann, who subsequently taught notables Edmund Tarbell and Frank Benson. From 1878 to 1885, Churchill was in Paris studying with Leon Bonnat and upon returning to Boston, he established himself as a portrait painter.