Baciu is a Romanian surname, a cognate of Slavic "Bača". 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