This was 11.2 percent lower than the state average of 39.6 percent. In 2020 the total municipality population reached 431.
94.1 percent of the population had at least a high school diploma or the equivalent.
Degree distribution in Lennon for 2020*
| Degree | Number of people | Percentage of population |
|---|---|---|
| No degree | 17 | 5.9 |
| Regular high school diploma | 106 | 36.7 |
| GED or alternative credential | 7 | 2.4 |
| Some college, less than 1 year | 32 | 11.1 |
| Some college, 1 or more years, no degree | 45 | 15.6 |
| Associate's degree | 32 | 11.1 |
| Bachelor's degree | 39 | 13.5 |
| Master's degree | 10 | 3.5 |
| Professional school degree | 1 | 0.3 |
| Doctorate degree | 0 | 0 |
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