Gmina Osieczna is an urban-rural gmina (administrative district) in Leszno County, Greater Poland Voivodeship, in west-central Poland. Its seat is the town of Osieczna, which lies approximately north-east of Leszno and south of the regional capital Poznań.
The gmina covers an area of , and as of 2006 its total population is 8,576 (out of which the population of Osieczna amounts to 2,018, and the population of the rural part of the gmina is 6,558).
Villages
Apart from the town of Osieczna, Gmina Osieczna contains the villages and settlements of Adamowo, Berdychowo, Chmielkowo, Dobramyśl, Drzeczkowo, Frankowo, Górka, Grodzisko, Jeziorki, Kąkolewo, Kąty, Kleszczewo, Kopanina, Łoniewo, Maciejewo, Miąskowo, Nowe Wolkowo, Popowo Wonieskie, Świerczyna, Trzebania, Ustronie, Witosław, Wojnowice, Wolkowo and Ziemnice.
Neighbouring gminas
Gmina Osieczna is bordered by the city of Leszno and by the gminas of Krzemieniewo, Krzywiń, Lipno, Rydzyna and Śmigiel.