Gianmarco is an Italian masculine given name. Its English equivalent is "John Mark" and it is short for "Giovanni Marco".
Notable people with the name include:
- Gianmarco Bellini (born 1958), Italian Air Force officer
- Gianmarco Cavagnino (born 1964), Italian architect
- Gianmarco Ottaviano (born 1967), Italian economist
- Gian Marco Zignago (born 1970), Peruvian musician
- Gianmarco Pozzecco (born 1972), Italian basketball player
- Gianmarco Soresi (born 1988), American comedian
- Gianmarco Zigoni (born 1991), Italian footballer
- Gianmarco Piccioni (born 1991), Italian footballer
- Gianmarco Tamberi (born 1992), Italian high jumper
- Gianmarco Donaggio (born 1991), Italian experimental film director and cinematographer
- Gianmarco Ercoli (born 1995), Italian professional racing driver
- Gianmarco Cangiano (born 2001), Italian footballer