Cachia is a surname of Maltese origin. People with this surname include:
Antonio Cachia (1739–1813), Maltese architect, engineer and archaeologist
Domenico Cachia (c. 1690–1761), Maltese capomastro
Jamie Cachia (born 1987), Scottish field hockey goalkeeper
Jaryd Cachia (born 1991), Australian rules footballer
Michele Cachia (1760–1839), Maltese architect and military engineer
Alfredo Cachia Zammit (1890–1960), Maltese politician and philanthropist
Therese Comodini Cachia (born 1973), Maltese lawyer and politician
