Ostrów [ˈɔstruf] (German: Idaswalde) is a settlement in the administrative district of Gmina Chojna, within Gryfino County, West Pomeranian Voivodeship, in north-western Poland, close to the German border. It lies approximately 8 kilometres (5 mi) south-west of Chojna, 37 km (23 mi) south of Gryfino, and 56 km (35 mi) south of the regional capital Szczecin.

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

The settlement has a population of 4.