The age distribution, , in Müllheim is; 285 children or 10.8% of the population are between 0 and 9 years old and 387 teenagers or 14.7% are between 10 and 19. Of the adult population, 297 people or 11.3% of the population are between 20 and 29 years old. 330 people or 12.6% are between 30 and 39, 492 people or 18.7% are between 40 and 49, and 370 people or 14.1% are between 50 and 59. The senior population distribution is 242 people or 9.2% of the population are between 60 and 69 years old, 138 people or 5.2% are between 70 and 79, there are 77 people or 2.9% who are between 80 and 89,and there are 11 people or 0.4% who are 90 and older.