The KOLUBARSKI District occupies the central part of western Serbia.
It encompasses the municipalities of:

• Lajkovac

• Ljig

• Mionica

• Osecina

• Ub

• Valjevo

It has a population of 200,560. The seat of the District is in the city of Valjevo, on the banks of the Kolubara river.

Prevailing industries in this region are: metal industry, agricultural production (plums, raspberries, blackberries) and food processing industry.

The major tourism resorts in the district are: the Divcibare Mountains and the Vrujci Spa.