Baca is a surname. Notable people with the surname include:
Baca family of New MexicoGeovany Baca (born 1971), Honduran boxerJoe Baca (born 1947), American member of CongressJoe Baca, Jr. (born 1969), former member of California AssemblyPolly Baca (born February 13, 1941) is an American politician who served as Chair the Democratic Caucus of the Colorado House of Representatives (1976–79), being the first woman to hold that office, and the first Hispanic woman elected to the Colorado State Senate and in the House and Senate of a state Legislature.Susana Baca (born 1944), Afro-Peruvian singer