John Underwood may refer to:

• John Underwood (actor), early 17th-century English actor
• John Underwood (PR adviser), former Director of Communications for British Labour Party
• John W.H. Underwood, U.S. Representative from Georgia
• John Curtiss Underwood, lawyer, Abolitionist politician, and federal judge
• John Underwood (American football) (1901-1932), played for the Milwaukee Badgers in the 1920s

• The 1980 Summer Olympics
• The 1980 Winter Olympics
• The 1982 Hymnal
• The 1982 Reunion Concert
• The 1984 Olympics
• The 1984 Summer Olympics
• The 1984 Winter Olympics
• The 1985
• The 1988 Olympics
• The 1988 Summer Olympics
• The 1990 Daytona 500
• The 1990s
• The 1990s (band)
• The 1990 Trust
• The 1992 Olympics
• The 1992 Summer Olympics
• The 1992 Winter Olympics
• The 1994 Winter Olympics
• The 1996 DEP Sessions
• The 1996 Everest Disaster
• The 1996 Olympic Venues
• The 1996 Summer Olympics
• The 1996 Winter Olympics
• The 1998 FIVB Women's World Championship
• The 1998 Winter Olympics