The Western Realm was the name given to the portion of the Kingdom of the Isles west of Malac's Cross. It was expanded when Nicholas conDoin brought the army westward to the province of Bosania.

The capital of the Western Realm was Krondor, and authority was vested in the Prince of Krondor. The military force of the Western Realm is the Armies of the West, under the Prince who is the Lord-Marshall.

Culturally and historically, the Western Realm is somehow a separate entity of the Eastern Realm, the Kingdom proper.

The Western Realm was once the Keshian Territory of Bosnia. During the Keshian Civil War, Bosnia was abandoned and retaken by the conDoins.

During the Chaoswar, the Western Realm was taken over by Keshian Dog Soldiers