| Ciechanów County | |
| Native Name: | Powiat ciechanowski |
| Settlement Type: | County |
| Total Type: | Total |
| Image Map1: | POL powiat ciechanowski map.svg |
| Map Caption1: | Division into gminas |
| Subdivision Type: | Country |
| Subdivision Type1: | Voivodeship |
| Subdivision Name1: | Masovian |
| Area Total Km2: | 1062.62 |
| Population Total: | 89460 |
| Population As Of: | 2019 |
| Population Density Km2: | auto |
| Population Urban: | 47137 |
| Population Blank1 Title: | Rural |
| Population Blank1: | 42323 |
| Coor Pinpoint: | Ciechanów |
| Coordinates: | 52.8667°N 58°W |
| Seat: | Ciechanów |
| Parts Type: | Gminas |
| Parts: | Total 9 (incl. 1 urban) |
| P1: | Ciechanów |
| P2: | Gmina Ciechanów |
| P3: | Gmina Glinojeck |
| P4: | Gmina Gołymin-Ośrodek |
| P5: | Gmina Grudusk |
| P6: | Gmina Ojrzeń |
| P7: | Gmina Opinogóra Górna |
| P8: | Gmina Regimin |
| P9: | Gmina Sońsk |
| Blank Name: | Car plates |
| Blank Info: | WCI |
| Website: | http://www.ciechanow.powiat.pl/ |
Ciechanów County (Polish: powiat ciechanowski) is a unit of territorial administration and local government (powiat) in Masovian Voivodeship, east-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 Ciechanów, which lies 77km (48miles) north of Warsaw. The only other town in the county is Glinojeck, lying 250NaN0 west of Ciechanów.
The county covers an area of 1062.62km2. As of 2019 its total population is 89,460, out of which the population of Ciechanów is 44,118, that of Glinojeck is 3,019, and the rural population is 42,323.[1]
Ciechanów County is bordered by Mława County to the north, Przasnysz County to the north-east, Maków County and Pułtusk County to the east, and Płońsk County to the south.
The county is subdivided into nine gminas (one urban, one urban-rural and seven rural). These are listed in the following table, in descending order of population.
| Gmina | Type | Area (km2) | Population (2019) | Seat |
| Ciechanów | urban | 32.5 | 44,118 | |
| Gmina Glinojeck | urban-rural | 153.5 | 7,864 | Glinojeck |
| Gmina Sońsk | rural | 155.0 | 7,748 | Sońsk |
| Gmina Ciechanów | rural | 140.2 | 7,090 | Ciechanów * |
| Gmina Opinogóra Górna | rural | 139.8 | 5,953 | Opinogóra Górna |
| Gmina Regimin | rural | 111.3 | 5,018 | Regimin |
| Gmina Ojrzeń | rural | 123.1 | 4,288 | Ojrzeń |
| Gmina Gołymin-Ośrodek | rural | 110.6 | 3,777 | Gołymin-Ośrodek |
| Gmina Grudusk | rural | 96.7 | 3,604 | Grudusk |
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