The age distribution, , in Reinach is; 783 children or 9.9% of the population are between 0 and 9 years old and 1,002 teenagers or 12.7% are between 10 and 19. Of the adult population, 1,058 people or 13.4% of the population are between 20 and 29 years old. 957 people or 12.2% are between 30 and 39, 1,309 people or 16.6% are between 40 and 49, and 1,057 people or 13.4% are between 50 and 59. The senior population distribution is 795 people or 10.1% of the population are between 60 and 69 years old, 547 people or 6.9% are between 70 and 79, there are 317 people or 4.0% who are between 80 and 89,and there are 50 people or 0.6% who are 90 and older.