Tyszki-Gostery [ˈtɨʂki ɡɔsˈtɛrɨ] is a village in the administrative district of Gmina Czerwin, within Ostrołęka County, Masovian Voivodeship, in east-central Poland. It lies approximately 12 kilometres (7 mi) east of Czerwin, 25 km (16 mi) east of Ostrołęka, and 106 km (66 mi) north-east of Warsaw.