Modern
During the period of Austro-Hungarian administration (1878–1918), several fortifications were built on the surrounding hills, and there was a garrison based in the town. The imperial administrators also modernized the town, expanding it westwards, building the present main street, as well as several squares, parks, schools, tobacco plantations, etc.
Trebinje grew rapidly in the era of Josip Broz Tito's Socialist Federal Republic of Yugoslavia between 1945 and 1990. It especially developed its hydroelectric potential with dams, artificial lakes, tunnels, and hydroelectric plants. This industrial development brought a large increase in the urban population of Trebinje.
The Ravno municipality was formed within the former territory of Trebinje municipality for the area now belonging to the Federation of Bosnia and Herzegovina
