Bączki [ˈbɔnt͡ʂki] is a village in the administrative district of Gmina Maciejowice, within Garwolin County, Masovian Voivodeship, in east-central Poland. It lies approximately 13 kilometres (8 mi) north-west of Maciejowice, 18 km (11 mi) south-west of Garwolin, and 58 km (36 mi) south-east of Warsaw.