This was 0.8 percent higher than the state average of 43.7 percent. In 2020 the total municipality population reached 29,198.
89.5 percent of the population had at least a high school diploma or the equivalent.
Degree distribution in Niles for 2020*
| Degree | Number of people | Percentage of population |
|---|---|---|
| No degree | 2,357 | 10.5 |
| Regular high school diploma | 5,644 | 25.2 |
| GED or alternative credential | 717 | 3.2 |
| Some college, less than 1 year | 1,197 | 5.4 |
| Some college, 1 or more years, no degree | 2,496 | 11.2 |
| Associate's degree | 1,744 | 7.8 |
| Bachelor's degree | 5,650 | 25.3 |
| Master's degree | 1,733 | 7.7 |
| Professional school degree | 520 | 2.3 |
| Doctorate degree | 309 | 1.4 |
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