Başhan is a neighborhood in Bismil District, in Diyarbakır Province, Türkiye. Başhan lies at 714 m above sea level, 6.9 km from the Zagros mountains. It has 485 inhabitants. The nearest city is Batman, 27 km to the northeast. Among the landmarks around are Hirbemerdon Tepe (12.5 km), Zerzevan Castle (38 km) and Tushhan (14.9 km).