Vršac mountains are located in a direction west-east from Vršac, through the Serbian-Romanian border, to the river Černa. Their surface is about 172 km2, of which 122 km2 in the territory of Serbia, and 50 km2 in the territory of Romania. Considering the direction position and gravity zone of mountains of Vršac, Vršac mountain economic area on the Serbian side includes a district of nine settlements (Vršac, Mali Žam, Malo Središte, Veliko Središte, Markovac, Mesić, Jablanka, Gudurica, Sočica) with a total area of 424 km2. Changes in population in the settlements of the Vršac Mountains can be traced in the course of 166 years (from the 1836 to 2002) because we have reliable statistics for that period. The population changes show a nearly linear increase in Vršac itself and the decline of the population in other eight villages. In the area of economic geographic area of the mountains of Vršac, according to the 2002 census there were 40.736 inhabitants (74,9% of the total population in the municipality Vršac). The population is ethnically heterogeneous and this composition, to a greater or lesser extent, dates back to colonization during the 18th and 19 century. .