Gmina Wołczyn is an urban-rural gmina (administrative district) in Kluczbork County, Opole Voivodeship, in south-western Poland. Its seat is the town of Wołczyn, which lies approximately 12 kilometres (7 mi) west of Kluczbork and 40 km (25 mi) north of the regional capital Opole.
The gmina covers an area of 240.86 square kilometres (93.0 sq mi), and as of 2019 its total population is 13,579.