| Sieradz County | |
| Native Name: | Powiat sieradzki |
| Settlement Type: | County |
| Total Type: | Total |
| Subdivision Type: | Country |
| Subdivision Type1: | Voivodeship |
| Subdivision Name1: | Łódź |
| Area Total Km2: | 1491.04 |
| Population Total: | 121013 |
| Population As Of: | 2006 |
| Population Density Km2: | auto |
| Population Urban: | 53015 |
| Population Blank1 Title: | Rural |
| Population Blank1: | 67998 |
| Coor Pinpoint: | Sieradz |
| Coordinates: | 51.6°N 63°W |
| Seat: | Sieradz |
| Parts Type: | Gminas |
| Parts: | Total 11 (incl. 1 urban) |
| P1: | Sieradz |
| P2: | Gmina Błaszki |
| P3: | Gmina Brąszewice |
| P4: | Gmina Brzeźnio |
| P5: | Gmina Burzenin |
| P6: | Gmina Goszczanów |
| P7: | Gmina Klonowa |
| P8: | Gmina Sieradz |
| P9: | Gmina Warta |
| P10: | Gmina Wróblew |
| P11: | Gmina Złoczew |
| Blank Name: | Car plates |
| Blank Info: | ESI |
| Website: | http://www.powiat-sieradz.pl |
Sieradz County (Polish: powiat sieradzki) 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 largest town is Sieradz, which lies 54km (34miles) west of the regional capital Łódź. The county contains three other towns: Złoczew, lying 230NaN0 south-west of Sieradz, Warta, lying 140NaN0 north-west of Sieradz, and Błaszki, 230NaN0 west of Sieradz.
The county covers an area of 1491.04km2. As of 2006 its total population is 121,013, out of which the population of Sieradz is 44,045, that of Złoczew is 3,403, that of Warta is 3,388, that of Błaszki is 2,179, and the rural population is 67,998.
Sieradz County is bordered by Turek County and Poddębice County to the north, Zduńska Wola County and Łask County to the east, Wieluń County to the south, Wieruszów County to the south-west, and Ostrzeszów County and Kalisz County to the west.
The county is subdivided into 11 gminas (one urban, three urban-rural and seven rural). These are listed in the following table, in descending order of population.
| Gmina | Type | Area (km2) | Population (2006) | Seat |
| Sieradz | urban | 51.2 | 44,045 | |
| Gmina Błaszki | urban-rural | 201.6 | 15,090 | Błaszki |
| Gmina Warta | urban-rural | 252.9 | 13,074 | Warta |
| Gmina Sieradz | rural | 181.6 | 9,788 | Sieradz * |
| Gmina Złoczew | urban-rural | 118.0 | 7,398 | Złoczew |
| Gmina Brzeźnio | rural | 128.7 | 6,351 | Brzeźnio |
| Gmina Wróblew | rural | 113.2 | 6,244 | Wróblew |
| Gmina Goszczanów | rural | 123.3 | 5,814 | Goszczanów |
| Gmina Burzenin | rural | 119.0 | 5,665 | Burzenin |
| Gmina Brąszewice | rural | 106.3 | 4,485 | Brąszewice |
| Gmina Klonowa | rural | 95.4 | 3,059 | Klonowa |
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