Bartoszyce County (Polish: powiat bartoszycki) is a unit of territorial administration and local government (powiat) in Warmian-Masurian Voivodeship, northern Poland, on the border with Russia.

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

Its administrative seat and largest town is Bartoszyce, which lies 56 kilometres (35 mi) north of the regional capital Olsztyn.

The county covers an area of 1,308.54 square kilometres (505.2 sq mi).

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