Ostrza [ˈɔstʂa] is a settlement in the administrative district of Gmina Debrzno, within Człuchów County, Pomeranian Voivodeship, in northern Poland. It lies approximately 15 kilometres (9 mi) west of Debrzno, 26 km (16 mi) south-west of Człuchów, and 140 km (87 mi) south-west of the regional capital Gdańsk.

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