The age distribution, , in L'Isle is; 91 children or 9.4% of the population are between 0 and 9 years old and 117 teenagers or 12.1% are between 10 and 19. Of the adult population, 135 people or 13.9% of the population are between 20 and 29 years old. 122 people or 12.6% are between 30 and 39, 151 people or 15.6% are between 40 and 49, and 144 people or 14.9% are between 50 and 59. The senior population distribution is 104 people or 10.7% of the population are between 60 and 69 years old, 55 people or 5.7% are between 70 and 79, there are 35 people or 3.6% who are between 80 and 89, and there are 14 people or 1.4% who are 90 and older.