William Dana or Bill Dana may refer to:
Bill Dana (1924–2017), stage name of William Szathmary, American comedian, actor, and screenwriter William H. Dana (1930–2014), NASA test pilot and astronaut William Parsons Winchester Dana (1833–1927), American artist Mrs. William Starr Dana, name used by Frances Theodora Parsons (1861–1952), American botanist and author
See also William Dana Ewart, American inventor William Dana Orcutt, American book designer