Kartuzy County (Polish: powiat kartuski; Kashubian: kartësczi pòwiat) is a county in the Pomeranian Voivodeship, Poland, with administrative seat and largest town being Kartuzy.

It came into being on 1 January 1999, as a result of the Polish local government reforms passed in 1998.

The county covers an area of 1,120.04 square kilometres (432.4 sq mi).

The county is subdivided into eight gminas (two urban-rural and six rural).

These are listed in the following table, in descending order of population.