Leblanc is a French (meaning The White) surname and may refer to:
- Adrian Nicole LeBlanc, American journalist
- Alfred LeBlanc (1869–1921), French aviator
- André LeBlanc (1921–1998), Haitian comic artist
- André LeBlanc, fictional jewelry thief in DC Comics
- Christian LeBlanc (born 1958), American actor
- Diana Fowler LeBlanc (born 1940), widow of Romeo LeBlanc
- Dominic LeBlanc (born 1967), Canadian politician
- Dudley J. LeBlanc (1894–1971), Louisiana State Senator and the developer of Hadacol
- Fred S. LeBlanc, Louisiana attorney general and mayor of Baton Rouge
- Guy LeBlanc (born 1960), Canadian keyboardist, member of rock bands Nathan Mahl and Camel
- Lucie Leblanc (born 1962), Canadian politician
- Matt LeBlanc (born 1967), American actor
- Maurice Leblanc (1857–1923) French engineer and industrialist
- Maurice Leblanc (1864–1941), French novelist
- Jean-Marie Leblanc (born 1944), French cyclist and director of the Tour de France
- Neil LeBlanc (born 1956), Canadian politician
- Nicolas Leblanc (1742–1806), French chemist and surgeon
- Pat LeBlanc, American radio personality
- Roméo LeBlanc (1927–2009), Canadian Governor Genera
- Steven A. LeBlanc, archaeologist, author
- Wade LeBlanc, (born 1984), American baseball pitcher
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It may also refer to:
- Leblanc (musical instrument manufacturer), an American musical instrument manufacturer
- Leblanc (Automobile manufacturer), a Swiss manufacturer of high-performance cars.
- The Leblanc process is an obsolete chemical procedure for manufacturing soda ash
- Leblanc, a fictional character from the video game Final Fantasy X-2
- (Evaine) LeBlanc, the Deceiver, a champion from the video game League of Legends