- Type: Castle
- Inhabitants: 60% Coastal People, 25% Corsair,10% Haradan, 5% Black Númenórean
- Population: 210
- Origin: Constructed by the Captains of Umbar, c.TA 320
- Purpose: A rural powerbase for Lord Adumir of Umbar; administration of surrounding farmlands.
- Symbol: A Sea-eagle.
One of the fiefs and castles within Nen Umbar, Isigir is situated on the northern coast of Nen Umbar and produces many of the potent herbs for which Umbar is known. The castle was built during Ar-Pharazon's reign.
- Fanmodules:UMBAR & NEAR HARAD GAZETTEER
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