Ugljevik (Serbian Cyrillic: Угљевик) is a municipality and town in Republika Srpska, Bosnia and Herzegovina. The municipality located in the eastern foothills of Mount Majevica, in picturesque countryside, where wondrous and beautiful mountain starts descending towards the flatlands of Semberija, to which it is tied more than any other surrounding area. The center of the municipality is the town of Ugljevik, the most sunbathed and modern of communities in the Republika Srpska entity.