| Wieluń County | |
| Native Name: | Powiat wieluński |
| Settlement Type: | County |
| Total Type: | Total |
| Subdivision Type: | Country |
| Subdivision Type1: | Voivodeship |
| Subdivision Name1: | Łódź |
| Area Total Km2: | 927.69 |
| Population Total: | 78260 |
| Population As Of: | 2006 |
| Population Density Km2: | auto |
| Population Urban: | 24347 |
| Population Blank1 Title: | Rural |
| Population Blank1: | 53913 |
| Coor Pinpoint: | Wieluń |
| Coordinates: | 51.2225°N 18.5739°W |
| Seat: | Wieluń |
| Parts Type: | Gminas |
| Parts: | Total 10 |
| P1: | Gmina Biała |
| P2: | Gmina Czarnożyły |
| P3: | Gmina Konopnica |
| P4: | Gmina Mokrsko |
| P5: | Gmina Osjaków |
| P6: | Gmina Ostrówek |
| P7: | Gmina Pątnów |
| P8: | Gmina Skomlin |
| P9: | Gmina Wieluń |
| P10: | Gmina Wierzchlas |
| Blank Name: | Car plates |
| Blank Info: | EWI |
| Website: | http://www.powiat.wielun.pl |
Wieluń County (pl|powiat wieluński) is a unit of territorial administration and local government (powiat) in Łódź Voivodeship, 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 only town is Wieluń, which lies 88km (55miles) south-west of the regional capital Łódź.
The county covers an area of 927.69km2. As of 2006 its total population is 78,260, out of which the population of Wieluń is 24,347 and the rural population is 53,913.
Wieluń County is bordered by Sieradz County to the north, Łask County to the north-east, Bełchatów County and Pajęczno County to the east, Kłobuck County to the south-east, Olesno County to the south, and Wieruszów County to the west.
The county is subdivided into 10 gminas (one urban-rural and nine rural). These are listed in the following table, in descending order of population.
| Gmina | Type | Area (km2) | Population (2006) | Seat |
| Gmina Wieluń | urban-rural | 131.2 | 32,882 | Wieluń |
| Gmina Wierzchlas | rural | 119.2 | 6,651 | Wierzchlas |
| Gmina Pątnów | rural | 114.3 | 6,452 | Pątnów |
| Gmina Biała | rural | 75.0 | 5,503 | Biała |
| Gmina Mokrsko | rural | 77.8 | 5,446 | Mokrsko |
| Gmina Osjaków | rural | 100.7 | 4,780 | Osjaków |
| Gmina Ostrówek | rural | 101.6 | 4,642 | Ostrówek |
| Gmina Czarnożyły | rural | 69.9 | 4,591 | Czarnożyły |
| Gmina Konopnica | rural | 83.1 | 3,897 | Konopnica |
| Gmina Skomlin | rural | 55.0 | 3,416 | Skomlin |