David John Mays (November 22, 1896 – February 17, 1971) was an American lawyer and writer. He attempted to slow racial desegregation on behalf of Byrd Organization during the Massive Resistance era. Mays served as counsel to the Gray Commission which tried to formulate segregationists' response to the United States Supreme Court rulings in 1954 and 1955 in consolidated cases known as Brown v. Board of Education. He later unsuccessfully defended actions taken against NAACP attorneys (although he had argued against adoption of those laws and correctly predicted they would be overturned) and significantly unequal legislative reapportionment. In 2008 the University of Georgia Press published an annotated volume of excerpts of his diaries concerning the early years of Massive Resistance (1954-1959). In 1953, Mays won the Pulitzer Prize for Biography or Autobiography for Edmund Pendleton 1721-1803 (Harvard University Press, 1952), a biography of the late 18th-century Virginia politician and judge Edmund Pendleton.