Gmina Mietków is a rural gmina (administrative district) in Wrocław County, Lower Silesian Voivodeship, in south-western Poland. Its seat is the village of Mietków, which lies approximately 32 kilometres (20 mi) south-west of the regional capital Wrocław.
The gmina covers an area of 83.3 square kilometres (32.2 sq mi), and as of 2019 its total population is 3,767.
Gmina Mietków is bordered by the gminas of Kąty Wrocławskie, Kostomłoty, Marcinowice, Sobótka and Żarów.
The gmina contains the villages of Borzygniew, Chwałów, Domanice, Dzikowa, Maniów, Maniów Mały, Maniów Wielki, Mietków, Milin, Piława, Proszkowice, Stróża, Ujów and Wawrzeńczyce.