Biłgoraj County (Polish: powiat biłgorajski) is a unit of territorial administration and local government (powiat) in Lublin Voivodeship, eastern Poland.

It was established on January 1, 1999, as a result of the Polish local government reforms passed in 1998.

Its administrative seat and largest town is Biłgoraj, which lies 79 kilometres (49 mi) south of the regional capital Lublin.

The county covers an area of 1,677.79 square kilometres (647.8 sq mi).

The county is subdivided into 14 gminas (one urban, three urban-rural and 10 rural).