Saint-Martin-d'Arrossa (French pronunciation: [sɛ̃ maʁtɛ̃ daʁɔsa]; Basque: Arrosa)[3] is a commune in the Pyrénées-Atlantiques department in south-western France.

It is located in the former province of Lower Navarre.

[3] The commune is served by the Ossès-Saint-Martin-d'Arrossa railway station, on the Bayonne to Saint-Jean-Pied-de-Port railway line, which is served by TER (local) services operated by the SNCF.

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