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