Olszowy Kierz [ɔlˈʂɔvɨ ˈkʲɛʐ] is a settlement in the administrative district of Gmina Nowa Karczma, within Kościerzyna County, Pomeranian Voivodeship, in northern Poland. It lies approximately 3 kilometres (2 mi) south-east of Nowa Karczma, 17 km (11 mi) east of Kościerzyna, and 39 km (24 mi) south-west of the regional capital Gdańsk.

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