Waldo is a masculine given name which may refer to:
People:
Abbot Waldo of Reichenau (740–814), advisor of Charlemagne
Waldo Colburn (1824–1885), American politician
Waldo A. Evans (1869–1936), American naval captain and military governor
Waldo Frank (1889–1967), American novelist, historian, and critic
Waldo E. Harder (1918–1976), president of Grace University
M. Waldo Hatler (1894–1967), American soldier and Medal of Honor recipient
Waldo Hutchins (1822–1891), U.S. Congressman
Waldo P. Johnson (1817–1885), U.S. senator and Confederate congressman
Waldo Kantor (born 1960), Argentine volleyball player
Waldo K. Lyon (1914–1998), U.S. Navy physicist
Waldo Machado (born 1934), Brazilian former footballer
Waldo McBurney (1902–2009), credited as "America's Oldest Worker"
Waldo Ponce, Chilean football player
Waldo (musician) (born Marko Reijonen in 1967), Finnish eurodance musician
Waldo de los Ríos (1934–1977), Argentine composer and conductor
Waldo Salt (1914–1987), American screenwriter
Waldo E. Sexton (1885–1967), American businessman
Waldo Vieira (born 1932), Brazilian physician and spiritual medium
Waldo Williams (1904–1971), Welsh language poet
Fictional characters:
Waldo (in the U.S. and Canada; Wally elsewhere), central character in the Where's Wally? children's book series and television show
"Waldo", nickname of the tourist guy in a 9/11 attack hoax photograph
Waldo Faldo, a character from the television series Family Matters
Waldo Farthingwaite-Jones, title character of "Waldo" (short story) by Robert A. Heinlein
Waldo Pepper, title character of the film The Great Waldo Pepper
Waldo Schaeffer, aka Franz Hopper, a character from the French animated television series Code Lyoko
"Uncle Waldo", the drunken goose from Disney's "The Aristocats"
Waldo is the nephew and given name of UPA studios stable character, Mr Magoo. Waldo is Magoo's nephew and appears in many of the Mr.Magoo short cartoons.