Refer to:
- Persons:
- George Dewey, United States Naval officer who attained fame in the Spanish-American War; also referred to as Commodore Dewey, then Admiral Dewey, and as Dewey, the Hero of Manila.
- John Dewey - philosopher
- Thomas E. Dewey - a Governor of New York and unsuccessful candidate for President of the United States
- A. Peter Dewey - first American victim of Vietnam war
- Melvil Dewey, who devised the Dewey Decimal Classification for libraries
- Animals:
- Dewey (deer) - white-tailed deer cloned from a dead buck by the Texas A&M University College of Veterinary Medicine.
- Dewey (deer) - white-tailed deer cloned from a dead buck by the Texas A&M University College of Veterinary Medicine.
- Places:
- Dewey, Arizona
- Dewey, Wisconsin
- Dewey County, Oklahoma
- Dewey County, South Dakota
- Other Deweys:
- Huey Dewey and Louie - Donald Duck's Nephews
- The Dewey Decimal Classification by Melvil Dewey