Janostrów [jaˈnɔstruf] is a village in the administrative district of Gmina Dubienka, within Chełm County, Lublin Voivodeship, in eastern Poland, close to the border with Ukraine. It lies approximately 5 kilometres (3 mi) south-west of Dubienka, 30 km (19 mi) south-east of Chełm, and 94 km (58 mi) east of the regional capital Lublin.