Nieciecz (Polish pronunciation: [ˈɲɛtɕɛtʂ]) is a village in the administrative district of Gmina Wilga, within Garwolin County, Masovian Voivodeship, in east-central Poland. It lies approximately 5 kilometres (3 mi) north-west of Wilga, 21 km (13 mi) west of Garwolin, and 44 km (27 mi) south-east of Warsaw.