Nowe Miasto County (Polish: powiat nowomiejski) is a unit of territorial administration and local government (powiat) in Warmian-Masurian Voivodeship, northern 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 only town is Nowe Miasto Lubawskie, which lies 73 kilometres (45 mi) south-west of the regional capital Olsztyn.

The county covers an area of 695.01 square kilometres (268.3 sq mi). As of December 2023 its total population is 41,964, out of which the population of Nowe Miasto Lubawskie is 10,089 and the rural population is 31,875.

Neighbouring counties

Nowe Miasto County is bordered by Iława County to the north, Działdowo County to the east, Brodnica County to the south and Grudziądz County to the west.

Administrative division

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

GminaTypeArea (km2)Population (2006)Seat
Nowe Miasto Lubawskieurban11.611,036
Gmina Bratianrural138.07,859Mszanowo
Gmina Biskupiecrural241.39,652Biskupiec
Gmina Kurzętnikrural149.98,646Kurzętnik
Gmina Grodzicznorural154.36,195Grodziczno