Allemans (French pronunciation: [almɑ̃]; Occitan: Alamans) is a commune in the Dordogne department in Nouvelle-Aquitaine in southwestern France.

The river Sauvanie forms the commune's northern border, then flows into the Lizonne, which forms the commune's north-western border; then the Lizonne flows into the Dronne, which forms the commune's south-western and southern borders.

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