The Breznik municipality is in Pernik District (Western Bulgaria) and is located in the Western half of the Graovsko field. The average altitude above sea level is 750 m; the arable land is 204,000,000 sq. m. The municipal center town of Breznik is at a distance of 50 km from Sofia and 18 km from the district center Pernik.
The relief in the municipality Breznik is varied, the climate is moderate continental. To the northeast the valley borders Viskyar Mountain, and to the south and southwest it reaches Lubach and Cherna Gora mountains. Typical for the municipality are natural reserves of oil shale, red sandstone, iron-containing mineral water. The territory of the municipality is crossed by small rivers such as the Svetlya, the Konska, the Mala Reka. There are micro-dam lakes in many of the population centers, namely Begounovtsi, Slakovtsi, Konska, Izvor and Breznik. Many of the dams have been granted under concessions and are used for fish breeding, irrigation, tourism.