Nysa County () is a unit of territorial administration and local government (powiat) in Opole Voivodeship, south-western Poland, on the Czech border. 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 Nysa, which lies south-west of the regional capital Opole. The county contains four other towns: Gà Âuchoà Âazy, south of Nysa, Paczków, west of Nysa, Otmuchów, west of Nysa, and Korfantów, east of Nysa.
The county covers an area of . As of 2019 its total population is 136,393. The most populated towns are Nysa with 43,849 inhabitants, Gà Âuchoà Âazy with 13,534 inhabitants, and Paczków with 7,460 inhabitants.
Nysa County is bordered by ZÃÂ bkowice County to the west, Strzelin County and Brzeg County to the north, Opole County to the north-east, and Prudnik County to the south-east. It also borders the Czech Republic to the south-west.
The county is subdivided into nine gminas (five urban-rural and four rural). These are listed in the following table, in descending order of population.