The age distribution, , in Gerra is; 28 children or 9.2% of the population are between 0 and 9 years old and 28 teenagers or 9.2% are between 10 and 19. Of the adult population, 17 people or 5.6% of the population are between 20 and 29 years old. 33 people or 10.8% are between 30 and 39, 47 people or 15.4% are between 40 and 49, and 46 people or 15.1% are between 50 and 59. The senior population distribution is 53 people or 17.4% of the population are between 60 and 69 years old, 31 people or 10.2% are between 70 and 79, there are 22 people or 7.2% who are over 80.