Sieniawa (Polish pronunciation: [ɕɛˈɲava]) is a village in the administrative district of Gmina Łagów, within Świebodzin County, Lubusz Voivodeship, in western Poland. It lies approximately 6 kilometres (4 mi) north-east of Łagów, 18 km (11 mi) north-west of Świebodzin, 42 km (26 mi) south of Gorzów Wielkopolski, and 49 km (30 mi) north of Zielona Góra.