Ostromęcko [ɔstrɔˈmɛnt͡skɔ] (German: Reichssiedlung Kölzig) is a village in the administrative district of Gmina Bierzwnik, within Choszczno County, West Pomeranian Voivodeship, in north-western Poland. It lies approximately 4 kilometres (2 mi) south-west of Bierzwnik, 24 km (15 mi) south-east of Choszczno, and 84 km (52 mi) south-east of the regional capital Szczecin.

For the history of the region, see History of Pomerania.