Municipality if Mizia is located in northwestern Bulgaria and is one of the constitutive municipalities of Vratsa province. The Municipality consists of 6 settlements: town of Mizia - the municipal center, village of Voyvodovo, village of Krishovitsa, village of Lipnitsa, village of Sofronievo and village of Saraevo. The total population is 9173 inhabitants (as of July 21st , 2005).
The neighboring municipalities of Mizia are: Oryahovo, Kozloduy, Byala Slatina and Haredin. To the north it abuts on Danube River. Trough the territory of the municipality flows Skat river and a boundary between municipalities Kozloduy and Mizia is determined by Ogosta river.