The age distribution, , in Bonvillars is; 48 children or 10.6% of the population are between 0 and 9 years old and 74 teenagers or 16.3% are between 10 and 19. Of the adult population, 46 people or 10.2% of the population are between 20 and 29 years old. 67 people or 14.8% are between 30 and 39, 67 people or 14.8% are between 40 and 49, and 56 people or 12.4% are between 50 and 59. The senior population distribution is 43 people or 9.5% of the population are between 60 and 69 years old, 33 people or 7.3% are between 70 and 79, there are 16 people or 3.5% who are between 80 and 89, and there are 3 people or 0.7% who are 90 and older.