This was 9.3 percent lower than the state average of 41.8 percent. In 2020 the total municipality population reached 146.
91.9 percent of the population had at least a high school diploma or the equivalent.
Degree distribution in Lewis for 2020*
| Degree | Number of people | Percentage of population |
|---|---|---|
| No degree | 10 | 8.1 |
| Regular high school diploma | 42 | 34.1 |
| GED or alternative credential | 6 | 4.9 |
| Some college, less than 1 year | 8 | 6.5 |
| Some college, 1 or more years, no degree | 17 | 13.8 |
| Associate's degree | 7 | 5.7 |
| Bachelor's degree | 14 | 11.4 |
| Master's degree | 19 | 15.4 |
| Professional school degree | 0 | 0 |
| Doctorate degree | 0 | 0 |
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