Zajączków [zaˈjɔnt͡ʂkuf] is a village in the administrative district of Gmina Opole Lubelskie, within Opole Lubelskie County, Lublin Voivodeship, in eastern Poland. It lies approximately 3 kilometres (2 mi) north-east of Opole Lubelskie and 41 km (25 mi) west of the regional capital Lublin.