Trzcianka [ˈtʂt͡ɕaŋka] is a village in the administrative district of Gmina Sobolew, within Garwolin County, Masovian Voivodeship, in east-central Poland. It lies approximately 7 kilometres (4 mi) east of Sobolew, 18 km (11 mi) south-east of Garwolin, and 73 km (45 mi) south-east of Warsaw.