The aim of this study was the analysis of demographic indicators of the age-sex structure (average age, aging index, coefficient of age dependency ratios and the coefficient of femininity) describe the demographic dynamics in the area of Šibensko kninske županije, and the level of aging county based on the last census in 2011. Data were analyzed on the administrative-territorial level of towns / municipalities five censuses (1971- 2011.) with the projection of the considered changes by 2030. The population of Šibensko-kninske županije has the feature of a very deep demographic age resulting combined effect of long-term emigration, falling birth rate / fertility, and early 90's direct and indirect impact of the war. According to projections of the demographic picture of Šibensko kninske županije shows a downward trend in population by -18%, and further deterioration of the age structure of the population (aging index 232.7), which will result in the depopulation of rural settlements. The fundamental determinant of future population development will be the demographic extinction, which means that some settlements will become only geographical names.