Baciu is a Romanian surname. Notable people with the surname include:

• Camil Baciu (1926–2005), Romanian journalist and science fiction writer
• Catalin Baciu (born 1988), Romanian basketball player
• Diana Baciu (born 1994), Moldovan chess champion
• Eugen Baciu (born 1980), Romanian football player
• Ioana Baciu (born 1990), Romanian female volleyball player
• Ion Baciu (born 1944), Romanian wrestler
• Maria Baciu (born 1942), Romanian poet
• Marius Baciu (born 1975), Romanian footballer
• Ștefan Baciu (1918–1993), Romanian poet
• Tinel Baciu (born 1968), Romanian footballer for Politehnica Iași