Sierczynek [ɕɛrˈt͡ʂɨnɛk] is a village in the administrative district of Gmina Trzciel, within Międzyrzecz County, Lubusz Voivodeship, in western Poland. It lies approximately 6 kilometres (4 mi) west of Trzciel, 17 km (11 mi) south-east of Międzyrzecz, 54 km (34 mi) north of Zielona Góra, and 54 km (34 mi) south-east of Gorzów Wielkopolski.