The age distribution, , in Mümliswil-Ramiswil is; 237 children or 9.3% of the population are between 0 and 6 years old and 473 teenagers or 18.5% are between 7 and 19. Of the adult population, 133 people or 5.2% of the population are between 20 and 24 years old. 759 people or 29.7% are between 25 and 44, and 535 people or 21.0% are between 45 and 64. The senior population distribution is 312 people or 12.2% of the population are between 65 and 79 years old and there are 104 people or 4.1% who are over 80.