Boylu is a village in Şirvan District, in Siirt Province, Türkiye. Boylu lies at 1,024 m above sea level, in the Southeastern Taurus mountains. It has 462 inhabitants. The nearest city is Siirt, 18.9 km to the south. Among the landmarks around are Tomb of İsmail Fakirullah (17.4 km) and Alkumru Dam (20 km).