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
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