Nakło County (Polish: powiat nakielski) 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 Nakło nad Notecią, which lies 28 km (17 mi) west of Bydgoszcz and 70 km (43 mi) west of Toruń.

The county contains three other towns: Szubin, lying 18 km (11 mi) south-east of Nakło nad Notecią, Kcynia, lying 18 km (11 mi) south-west of Nakło nad Notecią, and Mrocza, 12 km (7 mi) north of Nakło nad Notecią.

The county covers an area of 1,120.48 square kilometres (432.6 sq mi).