The age distribution, , in Ropraz is; 35 children or 9.8% of the population are between 0 and 9 years old and 41 teenagers or 11.5% are between 10 and 19. Of the adult population, 40 people or 11.2% of the population are between 20 and 29 years old. 40 people or 11.2% are between 30 and 39, 59 people or 16.6% are between 40 and 49, and 54 people or 15.2% are between 50 and 59. The senior population distribution is 39 people or 11.0% of the population are between 60 and 69 years old, 29 people or 8.1% are between 70 and 79, there are 18 people or 5.1% who are between 80 and 89, and there is 1 person who is 90 and older.