Tarnowskie Góry County (Polish: powiat tarnogórski) is a unit of territorial administration and local government (powiat) in Silesian Voivodeship, southern 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 largest town is Tarnowskie Góry, which lies 25 kilometres (16 mi) north-west of the regional capital Katowice.

The county contains three other towns: Radzionków, 8 km (5 mi) south of Tarnowskie Góry, Kalety, 14 km (9 mi) north of Tarnowskie Góry, and Miasteczko Śląskie, 5 km (3 mi) north-east of Tarnowskie Góry.

The county covers an area of 642.63 square kilometres (248.1 sq mi).