The age distribution, , in Kirchberg is; 1,148 children or 14.5% of the population are between 0 and 9 years old and 1,235 teenagers or 15.6% are between 10 and 19. Of the adult population, 901 people or 11.4% of the population are between 20 and 29 years old. 1,286 people or 16.3% are between 30 and 39, 1,170 people or 14.8% are between 40 and 49, and 792 people or 10.0% are between 50 and 59. The senior population distribution is 577 people or 7.3% of the population are between 60 and 69 years old, 483 people or 6.1% are between 70 and 79, there are 250 people or 3.2% who are between 80 and 89, and there are 61 people or 0.8% who are between 90 and 99, and 1 person who is 100 or more.