This was 12.8 percent higher than the state average of 43.7 percent. In 2020 the total municipality population reached 26,788.
97.8 percent of the population had at least a high school diploma or the equivalent.
Degree distribution in New Lenox for 2020*
| Degree | Number of people | Percentage of population |
|---|---|---|
| No degree | 379 | 2.2 |
| Regular high school diploma | 3,339 | 19.6 |
| GED or alternative credential | 220 | 1.3 |
| Some college, less than 1 year | 1,054 | 6.2 |
| Some college, 1 or more years, no degree | 2,399 | 14.1 |
| Associate's degree | 2,052 | 12.1 |
| Bachelor's degree | 4,571 | 26.9 |
| Master's degree | 2,521 | 14.8 |
| Professional school degree | 217 | 1.3 |
| Doctorate degree | 244 | 1.4 |
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