The Kolubara District (Serbian: Колубарски округ / Kolubarski okrug, pronounced [kɔlǔbarskiː ôkruːɡ]) is one of eight administrative districts of Šumadija and Western Serbia.

It occupies the central part of western Serbia.

Ethnic composition of the district:[2] This region is distinguished for its cultural-historic monuments: the Muselim's Palace, a typical example of the Turkish architecture built in the thirteenth century, the Tower of the Nenadovic Family, built in 1813 by Duke Janko, the church of Valjevo originating from 1838 which is a rare example of monumental classicistic style building in Serbia.

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

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