Port-Jérôme-sur-Seine (French pronunciation: [pɔʁ ʒeʁom syʁ sɛn]) is a commune in the department of Seine-Maritime, northern France.

The municipality was established on 1 January 2016 by merger of the former communes of Notre-Dame-de-Gravenchon, Auberville-la-Campagne, Touffreville-la-Cable and Triquerville.

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