Most of the population living in Napierville are 45 to 49 years old. This accounts for about 8.4% of the general population. Looking at specific age groups: Youth (0 to 17 years) old account for 28.84% of the population of Napierville. Young Adults (18 to 44 years) old account for 33.95% of the population of Napierville. Middle Age (45 to 65 years) old account for 28.69% of the population of Napierville. Old Age (65+ years) old account for 15.2% of the population of Napierville.
| Statistic | Percentage |
|---|---|
| Youth (0 to 17 years) | 28.84 % |
| Young Adults (18 to 44 years) | 33.95 % |
| Middle Age (45 to 65 years) | 28.69 % |
| Old Age (65+ years) | 15.20 % |