Gmina Byczyna is an urban-rural gmina (administrative district) in Kluczbork County, Opole Voivodeship, in south-western Poland. Its seat is the town of Byczyna, which lies approximately north of Kluczbork and north of the regional capital Opole.
The gmina covers an area of , and as of 2019 its total population is 9,305.
Apart from the town of Byczyna, Gmina Byczyna contains the villages and settlements of Biskupice, Borek, Chudoba, Ciecierzyn, Dobiercice, Goà Âkowice, Gosà Âaw, Jakubowice, Janówka, Jaà Âkowice, Kochà Âowice, Kostów, Miechowa, Nasale, Paruszowice, Pogorzaà Âka, Polanowice, Proà Âlice, Pszczonki, Roszkowice, Sarnów, Sierosà Âawice and Wojsà Âawice.
Gmina Byczyna is bordered by the gminas of Bolesà Âawiec, Gorzów à Âlàski, Kluczbork, à ÂÃÂka Opatowska, à Âubnice, Trzcinica and Woà Âczyn.
Gmina Byczyna is twinned with: