 This represents a population growth rate of -0.2%.The age distribution, , in Giebenach is; 61 children or 6.1% of the population are between 0 and 6 years old and 139 teenagers or 13.9% are between 7 and 19.Of the adult population, 97 people or 9.7% of the population are between 20 and 29 years old.