Northmoor is a duchy on the western coast of High Rock in the Iliac Bay region. It is bordered by Ykalon to the east, the Ilessan Hills and Glenpoint to the south, and Glenumbra Moors to the southwest. The provincial seat is the city of Northmoor. The Garlythi clan is the predominant vampire bloodline, and the regional deity is Mara.
There was once a tiny but inhabited island off the coast of Northmoor, called Caecilly Island, which was cast into the void by Mehrunes Dagon to take revenge on Chimere Graegyn, a retainer of Clan Direnni who tricked him.