Gmina Mieroszów is an urban-rural gmina (administrative district) in Wałbrzych County, Lower Silesian Voivodeship, in south-western Poland. Its seat is the town of Mieroszów, which lies approximately 15 kilometres (9 mi) south-west of Wałbrzych, and 79 kilometres (49 mi) south-west of the regional capital Wrocław.
The gmina covers an area of 76.17 square kilometres (29.4 sq mi), and as of 2019 its total population is 6,808.