Cachia is a surname of Maltese origin. People with this surname include:

• Antonio Cachia (1739–1813), Maltese architect, engineer and archaeologist
• Domenico Cachia ({{circa}} 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

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