 In the town, the population consisted of 21.2% inhabitants under the age of 18; 38.6% between the age of 18 and 44; 23.6% from 45 to 64; and 16.6% residents who were 65 years of age or older.Figure 1.Population pyramid in 2010 — by age group and sex

In the years 1970 of last age, sorted and prepared out list part of names of localities for Osiek, at as type of settlement then yet is a village, what you can see in table 3.