Iraqi Kurdistan or Southern Kurdistan refers to the Kurdish-populated part of northern Iraq. It is considered one of the four parts of "Kurdistan" in West Asia, which also includes parts of southeastern Turkey, northern Syria, and northwestern Iran. Much of the geographical and cultural region of Iraqi Kurdistan is part of the Kurdistan Region (KRI), an autonomous region recognized by the Constitution of Iraq. As with the rest of Kurdistan, and unlike most of the rest of Iraq, the region is inland and mountainous.

Iranian Kurdistan or Eastern Kurdistan is an unofficial name for the parts of northwestern Iran with either a majority or sizable population of Kurds. Geographically, it includes the West Azerbaijan Province, Kurdistan Province, Kermanshah Province, Ilam Province and parts of Hamadan Province and Lorestan Province.