| Koszalin County | |
| Native Name: | Powiat koszaliński |
| Settlement Type: | County |
| Total Type: | Total |
| Image Map1: | Zko_gminy.svg |
| Map Caption1: | Division into gminas |
| Subdivision Type: | Country |
| Subdivision Type1: | Voivodeship |
| Subdivision Name1: | West Pomeranian |
| Area Total Km2: | 1669.09 |
| Population Total: | 64087 |
| Population As Of: | 2006 |
| Population Density Km2: | auto |
| Population Urban: | 13956 |
| Population Blank1 Title: | Rural |
| Population Blank1: | 50131 |
| Coor Pinpoint: | Koszalin |
| Coordinates: | 54.1833°N 27°W |
| Seat: | Koszalin |
| Parts Type: | Gminas |
| Parts: | Total 8 |
| P1: | Gmina Będzino |
| P2: | Gmina Biesiekierz |
| P3: | Gmina Bobolice |
| P4: | Gmina Manowo |
| P5: | Gmina Mielno |
| P6: | Gmina Polanów |
| P7: | Gmina Sianów |
| P8: | Gmina Świeszyno |
| Blank Name: | Car plates |
| Blank Info: | ZKO |
| Website: | http://www.powiat.koszalin.pl |
Koszalin County (pl|powiat koszaliński) is a unit of territorial administration and local government (powiat) in West Pomeranian Voivodeship, north-western Poland, on the Baltic coast. It came into being on January 1, 1999, as a result of the Polish local government reforms passed in 1998. Its administrative seat is the city of Koszalin, although the city is not part of the county (it constitutes a separate city county). The county contains three towns: Sianów, 100NaN0 north-east of Koszalin, Bobolice, 370NaN0 south-east of Koszalin, and Polanów, 350NaN0 east of Koszalin.
The county covers an area of 1669.09km2. As of 2006 its total population is 64,087, out of which the population of Sianów is 6,543, that of Bobolice is 4,446, that of Polanów is 2,967, and the rural population is 50,131.
Apart from the city of Koszalin, Koszalin County is also bordered by Sławno County, Słupsk County and Bytów County to the east, Szczecinek County and Białogard County to the south, and Kołobrzeg County to the west. It also borders the Baltic Sea to the north.
The county is subdivided into eight gminas (three urban-rural and five rural). These are listed in the following table, in descending order of population.
| Gmina | Type | Area (km2) | Population (2006) | Seat |
| Gmina Sianów | urban-rural | 226.8 | 13,251 | Sianów |
| Gmina Bobolice | urban-rural | 367.7 | 9,905 | Bobolice |
| Gmina Będzino | rural | 180.9 | 9,287 | Będzino |
| Gmina Polanów | urban-rural | 393.1 | 9,194 | Polanów |
| Gmina Manowo | rural | 188.6 | 6,322 | Manowo |
| Gmina Świeszyno | rural | 132.6 | 5,621 | Świeszyno |
| Gmina Biesiekierz | rural | 116.9 | 5,439 | Biesiekierz |
| Gmina Mielno | rural | 62.5 | 5,068 | Mielno |