Gmina Wymiarki is a rural gmina (administrative district) in Żagań County, Lubusz Voivodeship, in western Poland. Its seat is the village of Wymiarki, which lies approximately 20 kilometres (12 mi) south-west of Żagań and 56 km (35 mi) south-west of Zielona Góra.
The gmina covers an area of 63.09 square kilometres (24.4 sq mi), and as of 2006 its total population is 2,449.
Gmina Wymiarki contains the villages and settlements of Lubartów, Lubieszów, Lutynka, Silno Małe, Witoszyn and Wymiarki.
Gmina Wymiarki is bordered by the gminas of Iłowa, Przewóz and Żary.