Gmina Milejów is a rural gmina (administrative district) in Łęczna County, Lublin Voivodeship, in eastern Poland. Its seat is the village of Milejów-Osada, which lies approximately 10 kilometres (6 mi) south of Łęczna and 26 km (16 mi) east of the regional capital Lublin.
The gmina covers an area of 115.66 square kilometres (44.7 sq mi), and as of 2006 its total population is 9,256 (9,263 in 2015).