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Krosno County () is a unit of territorial administration and local government (powiat) in Lubusz Voivodeship, western Poland, on the German border. It came into being on 1 January 1999 as a result of the Polish local government reforms passed in 1998. Its administrative seat is the town of Krosno Odrzańskie, which lies west of Zielona Góra and south of Gorzów Wielkopolski. The only other town is Gubin which is the biggest town in the county. It is situated on the German border west of Krosno Odrzańskie.
The county covers an area of . As of 2019 its total population is 55,018, out of which the population of Gubin is 16,619, that of Krosno Odrzańskie is 11,319, and the rural population is 27,080.
Neighbouring counties
Krosno County is bordered by Słubice County to the north-west, Sulęcin County to the north, Świebodzin County to the north-east, Zielona Góra County to the east and Żary County to the south. It also borders Brandenburg in Germany to the west.
Administrative division
The county is subdivided into seven gminas (one urban, one urban-rural and five rural). These are listed in the following table, in descending order of population.
{| class="wikitable sortable"
|-
! Gmina
! Type
! Area<br><small>(km<sup>2</sup>)</small>
! Population<br><small>(2019)</small>
! Seat
|-
|Gmina Krosno Odrzańskie
|urban-rural
| style="text-align:right;"|211.5
| style="text-align:right;"|17,784
|Krosno Odrzańskie
|-
|Gubin
|urban
| style="text-align:right;"|20.7
| style="text-align:right;"|16,619
|
|-
|Gmina Gubin
|rural
| style="text-align:right;"|379.7
| style="text-align:right;"|7,156
|Gubin*
|-
|Gmina Dąbie
|rural
| style="text-align:right;"|170.0
| style="text-align:right;"|4,930
|Dąbie
|-
|Gmina Bobrowice
|rural
| style="text-align:right;"|185.1
| style="text-align:right;"|3,205
|Bobrowice
|-
|Gmina Maszewo
|rural
| style="text-align:right;"|213.6
| style="text-align:right;"|2,812
|Maszewo
|-
|Gmina Bytnica
|rural
| style="text-align:right;"|208.7
| style="text-align:right;"|2,512
|Bytnica
|-
|colspan=5 style="text-align:right;font-size:90%"|* seat not part of the gmina
|-
|}