Chacín is a surname. Notable people with the surname include:
Alejandro Chacín (born 1993), Venezuelan baseball player Gustavo Chacín (born 1980), Venezuelan baseball player Jhoulys Chacín (born 1988), Venezuelan-American baseball player María Teresa Chacín (born 1945), Venezuelan singer Pedro Itriago Chacín (1875–1936), Venezuelan lawyer, professor, politician, and diplomat Ramón Rodríguez Chacín (born 1951), Venezuelan politician
See also Chacón, another surname