 The age distribution, , in Zetzwil is; 107 children or 8.5% of the population are between 0 and 9 years old and 160 teenagers or 12.7% are between 10 and 19.Of the adult population, 168 people or 13.4% of the population are between 20 and 29 years old.166 people or 13.2% are between 30 and 39, 209 people or 16.6% are between 40 and 49, and 182 people or 14.5% are between 50 and 59.