Santo António dos Cavaleiros e Frielas is a civil parish in the municipality of Loures, Portugal. It was formed in 2013 by the merger of the former parishes Santo António dos Cavaleiros and Frielas. The population in 2011 was 28,052,Instituto Nacional de Estatística (INE), Census 2011 results according to the 2013 administrative division of Portugal in an area of 9.20 km2.

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