Postoliska [pɔstɔˈliska] is a village in the administrative district of Gmina Tłuszcz, within Wołomin County, Masovian Voivodeship, in east-central Poland. It lies approximately 3 kilometres (2 mi) north-east of Tłuszcz, 20 km (12 mi) north-east of Wołomin, and 41 km (25 mi) north-east of Warsaw.