The age distribution, , in Gletterens is; 63 children or 11.8% of the population are between 0 and 9 years old and 61 teenagers or 11.4% are between 10 and 19. Of the adult population, 45 people or 8.4% of the population are between 20 and 29 years old. 78 people or 14.6% are between 30 and 39, 93 people or 17.4% are between 40 and 49, and 70 people or 13.1% are between 50 and 59. The senior population distribution is 67 people or 12.5% of the population are between 60 and 69 years old, 32 people or 6.0% are between 70 and 79, there are 22 people or 4.1% who are between 80 and 89, and there are 5 people or 0.9% who are 90 and older.