Cachia is a surname of Maltese origin. People with this surname include:
Antonio Cachia (1739–1813), Maltese architect, engineer and archaeologistDomenico Cachia (c. 1690–1761), Maltese capomastroJamie Cachia (born 1987), Scottish field hockey goalkeeperJaryd Cachia (born 1991), Australian rules footballerMichele Cachia (1760–1839), Maltese architect and military engineerAlfredo Cachia Zammit (1890–1960), Maltese politician and philanthropistTherese Comodini Cachia (born 1973), Maltese lawyer and politician