Chojnice County (Kashubian: Chòniczzi kréz, Polish: powiat chojnicki) is a unit of territorial administration and local government (powiat) in Pomeranian Voivodeship, northern Poland.

Its administrative seat and largest town is Chojnice, which lies 103 kilometres (64 mi) south-west of the regional capital Gdańsk.

The county covers an area of 1,364.25 square kilometres (526.7 sq mi).

Following the First World War this part of West Prussia was awarded to Poland by the Treaty of Versailles.

From 1938 to 1945 the Landkreis Konitz was part of the newly created Reichsgau Danzig-West Prussia.