The age distribution, , in Kestenholz is; 163 children or 10.1% of the population are between 0 and 6 years old and 258 teenagers or 16.0% are between 7 and 19. Of the adult population, 95 people or 5.9% of the population are between 20 and 24 years old. 541 people or 33.5% are between 25 and 44, and 357 people or 22.1% are between 45 and 64. The senior population distribution is 157 people or 9.7% of the population are between 65 and 79 years old and there are 46 people or 2.8% who are over 80.