| Pisz County | |
| Native Name: | Powiat piski |
| Settlement Type: | County |
| Total Type: | Total |
| Image Map1: | piski.png |
| Map Caption1: | Division into gminas |
| Subdivision Type: | Country |
| Subdivision Type1: | Voivodeship |
| Subdivision Name1: | Warmian-Masurian |
| Area Total Km2: | 1776.17 |
| Population Total: | 57553 |
| Population As Of: | 2006 |
| Population Density Km2: | auto |
| Population Urban: | 34036 |
| Population Blank1 Title: | Rural |
| Population Blank1: | 23517 |
| Coor Pinpoint: | Pisz |
| Coordinates: | 53.6167°N 69°W |
| Seat: | Pisz |
| Parts Type: | Gminas |
| Parts: | Total 4 |
| P1: | Gmina Biała Piska |
| P2: | Gmina Orzysz |
| P3: | Gmina Pisz |
| P4: | Gmina Ruciane-Nida |
| Blank Name: | Car plates |
| Blank Info: | NPI |
| Website: | powiat.pisz.pl |
Pisz County (Polish: powiat piski) is a unit of territorial administration and local government (powiat) in Warmian-Masurian Voivodeship, northern Poland. It came into being on 1 January 1999 as a result of the Polish local government reforms passed in 1998. Its administrative seat and largest town is Pisz, which lies 88km (55miles) east of the regional capital Olsztyn. The county contains three other towns: Orzysz, 240NaN0 north-east of Pisz, Ruciane-Nida, 170NaN0 west of Pisz, and Biała Piska, 180NaN0 east of Pisz.
The county covers an area of 1776.17km2. As of 2006 its total population is 57,553, out of which the population of Pisz is 19,332, that of Orzysz is 5,804, that of Ruciane-Nida is 4,894, that of Biała Piska is 4,006, and the rural population is 23,517.
Pisz County is bordered by Giżycko County to the north, Ełk County and Grajewo County to the east, Kolno County and Ostrołęka County to the south, Szczytno County to the west, and Mrągowo County to the north-west.
The county is subdivided into four gminas (all urban-rural, centred on the four towns). These are listed in the following table, in descending order of population.
| Gmina | Type | Area (km2) | Population (2006) | Seat |
| Gmina Pisz | urban-rural | 634.8 | 27,224 | Pisz |
| Gmina Biała Piska | urban-rural | 420.1 | 12,135 | Biała Piska |
| Gmina Orzysz | urban-rural | 363.5 | 9,567 | Orzysz |
| Gmina Ruciane-Nida | urban-rural | 357.7 | 8,627 | Ruciane-Nida |