The region of the Posavje hills is the smallest region in the country (264 km2 ) and has the lowest number of population. At the same time it ranks second in terms of population density. The natural and geographic features of this region create conditions for industrial activities and around a third of gross value added is still created by mining, quarrying and manufacturing.
In 2009 the registered unemployment rate was still among the three highest in the country; it was for 4.2 percentage points higher as in the region with the lowest rate. Because of the lack of jobs a large share of the population commuted to work in other regions.
In 2009, Zasavska was the only region with negative annual population growth rate (–1‰). The decrease in the number of population was mainly a result of migration to other statistical regions. However, the fertility rate was higher than the mortality rate. In Zasavska in 2009 no infant under one year of age died and more than a half of live births were first-borns. The mean age of mothers at birth was among the lowest. The similar situation was also with couples at marriage.
According to data on dwellings, Zasavska has the smallest dwellings both in terms of size and the number of rooms. According to the number of completed dwellings, in 2009 Zasavska was the last among regions as only one dwelling per 1,000 population was completed.