Mozirje (Prassberg ) is a small town on the Savinja River in northern Slovenia. It is the seat of the Municipality of Mozirje. The area is part of the traditional region of Styria. It is now included in the Savinja Statistical Region.
Mozirje was mentioned in written sources in 1146 as Mosiri (and as Prossperch in 1231, Moziri in 1241, and Prasperch in 1391). The name is derived from the Slovene common noun mozirje 'swamp' and refers to the local geography. In the past the German name was Prassberg.
