The age distribution, , in Chavannes-sur-Moudon is; 24 children or 11.7% of the population are between 0 and 9 years old and 25 teenagers or 12.2% are between 10 and 19. Of the adult population, 14 people or 6.8% of the population are between 20 and 29 years old. 23 people or 11.2% are between 30 and 39, 37 people or 18.0% are between 40 and 49, and 32 people or 15.6% are between 50 and 59. The senior population distribution is 23 people or 11.2% of the population are between 60 and 69 years old, 14 people or 6.8% are between 70 and 79, there are 12 people or 5.9% who are between 80 and 89, and there is 1 person who is 90 and older.