The age distribution, , in Bärschwil is; 50 children or 5.7% of the population are between 0 and 6 years old and 176 teenagers or 20.2% are between 7 and 19. Of the adult population, 46 people or 5.3% of the population are between 20 and 24 years old. 236 people or 27.1% are between 25 and 44, and 231 people or 26.5% are between 45 and 64. The senior population distribution is 110 people or 12.6% of the population are between 65 and 79 years old and there are 23 people or 2.6% who are over 80.