Derło [ˈdɛrwɔ] is a village in the administrative district of Gmina Rokitno, within Biała Podlaska County, Lublin Voivodeship, in eastern Poland, close to the border with Belarus. It lies approximately 24 kilometres (15 mi) north-east of Biała Podlaska and 117 km (73 mi) north-east of the regional capital Lublin.