The analysis of the age structure of population of Goc Mountain and its foothill is elaborated in the paper. Data in the paper refer to the second half of 20th century and to the beginning of the 21st century. There are many tasks of the paper. The first task is to represent and to compare the parameters of age structure of Goc and his foothill. The task of this paper is to present the parameters of the age structure of Goc Mountain and its foothill. Then, comparing them to identify and interpret trends in their movements. The paper shows the spatial distribution of the index of aging by cadastral municipalities. Factors that have influenced it are highlighted. Special attention is given to problems, which appear as a consequence of aging of population. Paper will contribute to enriching the knowledge about population and settlements of the Goc Mountain and the West Morava valley. .