Marczów [ˈmart͡ʂuf] is a village in the administrative district of Gmina Wleń, within Lwówek Śląski County, Lower Silesian Voivodeship, in south-western Poland. It lies approximately 4 kilometres (2 mi) north-west of Wleń, 10 km (6 mi) south-east of Lwówek Śląski, and 98 km (61 mi) west of the regional capital Wrocław.