The age distribution, , in Chiasso is; 567 children or 7.3% of the population are between 0 and 9 years old and 586 teenagers or 7.5% are between 10 and 19. Of the adult population, 790 people or 10.2% of the population are between 20 and 29 years old. 1,118 people or 14.4% are between 30 and 39, 1,215 people or 15.7% are between 40 and 49, and 1,008 people or 13.0% are between 50 and 59. The senior population distribution is 996 people or 12.8% of the population are between 60 and 69 years old, 841 people or 10.8% are between 70 and 79, there are 642 people or 8.3% who are over 80.