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Sainte-Marthe-du-Cap is a former city in Quebec, Canada on the St. Lawrence River. It was amalgamated into the City of Trois-Rivières in 2002. Population (2001 census) 6,192.

46°22′36.3″N 72°29′30.3″W / 46.376750°N 72.491750°W / 46.376750; -72.491750 (Sainte-Marthe-du-Cap, Quebec)