Barnhart can refer to:
People:
- Brian Barnhart, American auto racing executive
- Clarence Barnhart (1900-1993), American lexicographer
- Clyde Barnhart (1895-1980), American baseball player
- Dan Barnhart (born 1912), American football player
- David Barnhart (born 1941), American lexicographer
- Frank A. Barnhart, American actor and director
- Gordon Barnhart (born 1945), Canadian politician
- Henry A. Barnhart (1858-1934), American politician
- Jeffrey L. Barnhart (born 1956), American politician
- Jennifer Barnhart, American puppeteer and actress
- Jo Anne B. Barnhart (born 1950), American civil servant
- Katie Barnhart, American figure skater
- Les Barnhart (1905-1971), American baseball player
- Mitch Barnhart (born 1959), American athletic director
- Nicole Barnhart (born 1981), American soccer goalkeeper
- Peter Barnhart, Canadian settler
- Phil Barnhart (born 1946), American politician
- Phyllis Barnhart (1922-2008), American animator and cel painter
- Ray Barnhart (born 1928), American politician
- Robert Barnhart (1933-2007), American lexicographer
- Steve Barnhart (born 1961), American business person
- Tony Barnhart (born 1953), American reporter
- Vic Barnhart (born 1921), American baseball player
Places:
- Barnhart, Missouri
- Barnhart, Texas
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