Septemvri is a town in Pazardzhik Province, Southern Bulgaria, located at the western end of the Upper Thracian Lowland, 19 km (12 mi) away to the west from the city of Pazardzhik. It is the administrative centre of homonymous Septemvri Municipality. As of December 2009, the town has a population of 8,422 inhabitants.

Pazardzhik Province is a province in Southern Bulgaria, named after its administrative and industrial centre - the city of Pazardzhik. The territory is 4,456.9 km2 (1,720.8 sq mi) that is divided into 12 municipalities with a total population of 275,548 inhabitants, as of February 2011.