Giancarlo is an Italian given name meaning "John Charles". It is one of the most common masculine given names in Italy and is often short for "Giovanni Carlo". Notable Giancarlos:
- Giancarlo Baghetti- Italian Formula One driver.
- Giancarlo Camolese- Italian footballer.
- Giancarlo Condemarín- a Peruvian musician.
- Giancarlo Esposito- American actor.
- Giancarlo Fisichella- Italian Formula One driver.
- Giancarlo Galan- Venetian politician.
- Giancarlo Giannini- Italian actor.
- Giancarlo Izzi- American materials scientist.
- Giancarlo Maldonado- Venezuelan footballer.
- Giancarlo Minardi- Founder of the Formula One team Minardi.
- Giancarlo Parretti- Italian financier.
- Gian-Carlo Rota - Mathematician and philosopher.
- Giancarlo Schiaffini - Italian jazz trombonist.
- Giancarlo Stanton - American Major League Baseball player.
- Giancarlo Volpe - American animator and director.