Başkale is situated 20 km (12 mi) west of the Turkey-Iran border. 138 km (86 mi) of the national border is on the east and north-east of the Başkale district. Başkale shares district borders with Yüksekova District of Hakkari Province to the south, Saray and Özalp districts of Van Province to the north, and Gürpınar district of Van Province to the west.
Başkale is situated 2460 metres above sea level, in the valley of the Great Zab River (Zapsuyu), and the town stands on the eastern slope of the south-eastern Taurus Mountains. The majority of the 2,599 km2 (1,003 sq mi) Başkale district is mountainous. The agricultural portion is only 355 km2 (137 sq mi), approximately 14% of the total area. Başkale is enclosed by Mount (Yiğit)/Haravil (3468 m) in the east, Mount Başkale/İspiriz (3668 m) in the west, and Mount Gökdağ (3604 m) in the south-east. The mountains of Mor, Haravil, Mengene and Çekvan are in the district of Başkale. Other geographical features in Başkale include the Karasu river, and the plateaus of Nebirnav, Kevçikan, Hanasor, Çekvan, Aşkitan (Ülya), Perihan, Meydan, Harinan, Terazın, Sülav, Medgezeren, Pistekan, Herevil-Şirez, Derevan, Derik, Bağarük, Düava and Mengen.