Gmina Rudniki is a rural gmina (administrative district) in Olesno County, Opole Voivodeship, in south-western Poland. Its seat is the village of Rudniki, which lies approximately 23 kilometres (14 mi) north-east of Olesno and 63 km (39 mi) north-east of the regional capital Opole.

The gmina covers an area of 100.52 square kilometres (38.8 sq mi), and as of 2019 its total population is 8,180.

Gmina Rudniki is bordered by the gminas of Krzepice, Lipie, Pątnów, Praszka and Radłów.

The gmina contains the villages of Banasiówka, Bliźniaki, Bobrowa, Borek, Brzeziny Cieciułowskie, Bugaj, Chwiły, Cieciułów, Dalachów, Faustianka, Hajdamaki, Ignachy, Janinów, Jaworek, Jaworzno, Jaworzno Bankowe, Jelonki, Julianpol, Kuźnica, Kuźnica Żytniowska, Łazy, Mirowszczyzna, Młyny, Mostki, Nowy Bugaj, Odcinek, Pieńki, Polesie, Porąbki, Rudniki, Słowików, Stanki, Stary Bugaj, Stawki Cieciułowskie, Stawki Żytniowskie, Teodorówka, Wytoka, Żurawie and Żytniów.

Of these, the following have the status of sołectwo: Bobrowa, Bugaj, Chwiły, Cieciułów, Dalachów, Faustianka, Janinów, Jaworek, Jaworzno, Jelonki, Julianpol, Kuźnica, Łazy, Mirowszczyzna, Młyny, Mostki, Odcinek, Porąbki, Rudniki, Słowików, Żytniów.

Gmina Rudniki is twinned with:

• Feilitzsch, Germany
• Soblahov, Slovakia