| Płońsk County | |
| Native Name: | Powiat płoński |
| Settlement Type: | County |
| Total Type: | Total |
| Image Map1: | POL powiat plonski map.svg |
| Map Caption1: | Division into gminas |
| Mapsize1: | 100px |
| Subdivision Type: | Country |
| Subdivision Type1: | Voivodeship |
| Subdivision Name1: | Masovian |
| Area Total Km2: | 1383.67 |
| Population Total: | 87183 |
| Population As Of: | 2019 |
| Population Density Km2: | auto |
| Population Urban: | 26514 |
| Population Blank1 Title: | Rural |
| Population Blank1: | 60669 |
| Coor Pinpoint: | Płońsk |
| Coordinates: | 52.6333°N 43°W |
| Seat: | Płońsk |
| Parts Type: | Gminas |
| Parts: | Total 12 (incl. 2 urban) |
| P1: | Płońsk |
| P2: | Raciąż |
| P3: | Gmina Baboszewo |
| P4: | Gmina Czerwińsk nad Wisłą |
| P5: | Gmina Dzierzążnia |
| P6: | Gmina Joniec |
| P7: | Gmina Naruszewo |
| P8: | Gmina Nowe Miasto |
| P9: | Gmina Płońsk |
| P10: | Gmina Raciąż |
| P11: | Gmina Sochocin |
| P12: | Gmina Załuski |
| Blank Name: | Car plates |
| Blank Info: | WPN |
| Website: | http://www.powiat-plonski.pl/ |
Płońsk County (Polish: powiat płoński) is a unit of territorial administration and local government (powiat) in Masovian Voivodeship, east-central Poland. It came into being on 1 January 1999, as a result of the Polish local government reforms passed in 1998. Its administrative seat and largest town is Płońsk, which lies 63km (39miles) north-west of Warsaw. The only other town in the county is Raciąż, lying 250NaN0 north-west of Płońsk.
The county covers an area of 1383.67km2. As of 2019, its total population is 87,183, out of which the population of Płońsk is 22,130, that of Raciąż is 4,384, and the rural population is 60,669.[1]
Płońsk County is bordered by Mława County and Ciechanów County to the north, Pułtusk County to the east, Nowy Dwór County to the south-east, Sochaczew County to the south, Płock County and Sierpc County to the west, and Żuromin County to the north-west.
The county is subdivided into 12 gminas (two urban and 10 rural). These are listed in the following table, in descending order of population.
| Gmina | Type | Area (km2) | Population (2019) | Seat |
| Płońsk | urban | 11.6 | 22,130 | |
| Gmina Raciąż | rural | 248.8 | 8,336 | Raciąż * |
| Gmina Baboszewo | rural | 162.4 | 7,957 | Baboszewo |
| Gmina Płońsk | rural | 127.3 | 7,922 | Płońsk * |
| Gmina Czerwińsk nad Wisłą | rural | 146.1 | 7,657 | Czerwińsk nad Wisłą |
| Gmina Naruszewo | rural | 159.6 | 6,340 | Naruszewo |
| Gmina Sochocin | rural | 119.7 | 5,823 | Sochocin |
| Gmina Załuski | rural | 111.7 | 5,667 | Załuski |
| Gmina Nowe Miasto | rural | 118.4 | 4,659 | Nowe Miasto |
| Raciąż | urban | 3.8 | 4,384 | |
| Gmina Dzierzążnia | rural | 102.1 | 3,658 | Dzierzążnia |
| Gmina Joniec | rural | 72.6 | 2,650 | Joniec |
| ||||