Gmina Siedlce is a rural gmina (administrative district) in Siedlce County, Masovian Voivodeship, in east-central Poland. Its seat is the town of Siedlce, although the town is not part of the territory of the gmina.
The gmina covers an area of 141.54 square kilometres (54.6 sq mi), and as of 2006 its total population is 15,893 (17,506 in 2014).