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The entire demographic structures a special places is holded from the population structure according to their age. It plays an important role not only to demographic elements but also to the economic, social and cultural development of the area part of this research study. Treating of age structure in Mallakastra during the period 2001-2011, is a very delicate issue and with diverse impacts on the whole life framework of its population. This issue deserves a special attention since need to be evident changes, impact factors and to show up the future tendencies. Age structure is product of natural and migratory movement within and outside the country. Through it is provided the necessary information for the population vitality, general average age, population reproduction, specific role of each of them etc. Also it serves to judge about the potential of the area for working forces, which tend to be of third age group and the requirements they have for diverse services such are; education, health care, administration, communication etc. Key Words: Average Age, Index of Old Age, Economic Indicators of General Subordination, Population With Tendency of Demographic Reduction, Population on the Eve of Became Old One, Population with Demographic Aging, Aging Process, Aging Coefficient.