| Nowe Miasto County | |
| Native Name: | Powiat nowomiejski |
| Settlement Type: | County |
| Total Type: | Total |
| Image Map1: | nowomiejski.png |
| Map Caption1: | Division into gminas |
| Subdivision Type: | Country |
| Subdivision Type1: | Voivodeship |
| Subdivision Name1: | Warmian-Masurian |
| Area Total Km2: | 695.01 |
| Population Total: | 43388 |
| Population As Of: | 2006 |
| Population Density Km2: | auto |
| Population Urban: | 11036 |
| Population Blank1 Title: | Rural |
| Population Blank1: | 32352 |
| Coor Pinpoint: | Nowe Miasto Lubawskie |
| Coordinates: | 53.4167°N 54°W |
| Seat: | Nowe Miasto Lubawskie |
| Parts Type: | Gminas |
| Parts: | Total 5 (incl. 1 urban) |
| P1: | Nowe Miasto Lubawskie |
| P2: | Gmina Biskupiec |
| P3: | Gmina Grodziczno |
| P4: | Gmina Kurzętnik |
| P5: | Gmina Nowe Miasto Lubawskie |
| Blank Name: | Car plates |
| Blank Info: | NNM |
| Website: | http://www.powiat-nowomiejski.pl |
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 73km (45miles) south-west of the regional capital Olsztyn.
The county covers an area of 695.01km2. As of 2006 its total population is 43,388, out of which the population of Nowe Miasto Lubawskie is 11,036 and the rural population is 32,352.
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.
The county is subdivided into five gminas (one urban and four rural). These are listed in the following table, in descending order of population.
| Gmina | Type | Area (km2) | Population (2006) | Seat |
| Nowe Miasto Lubawskie | urban | 11.6 | 11,036 | |
| Gmina Biskupiec | rural | 241.3 | 9,652 | Biskupiec |
| Gmina Kurzętnik | rural | 149.9 | 8,646 | Kurzętnik |
| Gmina Nowe Miasto Lubawskie | rural | 138.0 | 7,859 | Mszanowo |
| Gmina Grodziczno | rural | 154.3 | 6,195 | Grodziczno |