 The age distribution, , in Häggenschwil is; 212 children or 18.5% of the population are between 0 and 9 years old and 197 teenagers or 17.2% are between 10 and 19.Of the adult population, 110 people or 9.6% of the population are between 20 and 29 years old.220 people or 19.2% are between 30 and 39, 144 people or 12.6% are between 40 and 49, and 99 people or 8.7% are between 50 and 59.