|— County —|
|Coordinates (Kościerzyna): Coordinates:|
|• Total||1,165.85 km2 (450.14 sq mi)|
|• Density||57/km2 ( 150/sq mi)|
Kościerzyna County (Polish: powiat kościerski) is a unit of territorial administration and local government (powiat) in Pomeranian Voivodeship, northern Poland. It came into being on January 1, 1999, as a result of the Polish local government reforms passed in 1998. Its administrative seat and only town is Kościerzyna, which lies 51 kilometres (32 mi) south-west of the regional capital Gdańsk. Its borders equal approximately the borders of the old Marquessate of Berent in the German Empire.
The county covers an area of 1,165.85 square kilometres (450.1 sq mi). As of 2006 its total population is 66,778, out of which the population of Kościerzyna is 23,016 and the rural population is 43,762.
Kościerzyna County on a map of the counties of Pomeranian Voivodeship
Administrative division 
The county is subdivided into eight gminas (one urban and seven rural). These are listed in the following table, in descending order of population.
|Gmina Kościerzyna||rural||310.2||13,295||Kościerzyna *|
|Gmina Nowa Karczma||rural||113.3||6,288||Nowa Karczma|
|Gmina Stara Kiszewa||rural||213.1||6,267||Stara Kiszewa|
|* seat not part of the gmina|