Daruvar area is a representative example of demographic issues that are reflected in extremely low regional development of the area. The aim of this thesis is to contribute to the general knowledge about demographic processes and their effects on regional development of Daruvar area. Population is one of the main factors of regional development; the main task was to do a demographic analysis of the population in Daruvar area, and to show its impact on the regional development. After the initial analysis was done, a comparison was made between demographic indicators and overall regional development. The result of this comparison leads to the conclusion that an extremely unfavorable demographic structure of the population reflects the differences in regional development in Daruvar area, which is especially evident in the process of depopulation. Modern demographic development of Daruvar area is marked by an emigration of predominantly younger population, negative natural change and an intensive process of population senilisation. Polarized development is followed by a growing demographic abandoning of Daruvar rural periphery area, resulting in an increased disparity of regional development and burdening of the future development of the region.