S. A. Cook may refer to:
Samuel A. Cook (1849–1918), U.S. Representative from Wisconsin Stanley Arthur Cook (1873–1949), Cambridge professor of Hebrew, lecturer in comparative religion, Encyclopedia Biblica editor Samuel Albert Cook (1878–1915), medical doctor and member of the American Red Cross mission in Serbia Stephen Arthur Cook (born 1939), American-Canadian computer scientist and mathematician Sharon Anne Cook (born 1947), Canadian historian Lacey Dancer (born 1948), American author of romance novels, uses S. A. Cook as one of her various pen names