Brodnica County (Polish: powiat brodnicki) is a unit of territorial administration and local government (powiat) in Kuyavian-Pomeranian Voivodeship, north-central 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 Brodnica, which lies 58 km (36 mi) north-east of Toruń and 95 km (59 mi) east of Bydgoszcz. The county also contains the towns of Jabłonowo Pomorskie, lying 23 km (14 mi) north-west of Brodnica, and Górzno, 18 km (11 mi) east of Brodnica.

The county covers an area of 1,038.79 square kilometres (401.1 sq mi). As of 2019, its total population is 78,935, out of which the population of Brodnica is 28,788, that of Jabłonowo Pomorskie is 3,754, that of Górzno is 1,366, and the rural population is 45,027.

The county includes part of the protected area known as Brodnica Landscape Park.

Brodnica County is bordered by Nowe Miasto County to the north, Działdowo County and Żuromin County to the east, Rypin County to the south, Golub-Dobrzyń County to the south-west, and Wąbrzeźno County and Grudziądz County to the west.

The county is subdivided into 10 gminas (one urban, two urban-rural, and seven rural). These are listed in the following table, in descending order of population.

Gmina	Type	Area (km)	Population (2019)	Seat
Brodnica	urban	23.2	28,788
Gmina Jabłonowo Pomorskie	urban-rural	134.4	8,914	Jabłonowo Pomorskie
Gmina Brodnica	rural	127.0	8,445	Brodnica *
Gmina Bobrowo	rural	146.3	6,299	Bobrowo
Gmina Świedziebnia	rural	103.8	5,185	Świedziebnia
Gmina Bartniczka	rural	83.4	4,712	Bartniczka
Gmina Zbiczno	rural	132.9	4,876	Zbiczno
Gmina Osiek	rural	75.1	4,014	Osiek
Gmina Górzno	urban-rural	119.4	3,902	Górzno
Gmina Brzozie	rural	93.7	3,800	Brzozie
* seat not part of the gmina

• Polish official population figures 2019 Archived 2021-04-19 at the Wayback Machine