The Douze (French pronunciation: [duz] ⓘ; Occitan: Dosa) is the right source river of the Midouze, in the Landes, in the southwest of France.

[1] The Douze rises in Armagnac, in the Gers département.

It joins the Midou in Mont-de-Marsan to constitute the Midouze, a tributary of the Adour.

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