Başdeğirmen is a neighborhood in Siverek District, in Şanlıurfa Province, Türkiye. Başdeğirmen lies at 650 m above sea level. It has 182 inhabitants. The nearest city is Siverek, 16.7 km to the northeast. Among the landmarks around are Göbekli Tepe (52 km) and Hacıhıdır Dam (8.0 km).