This was 4.8 percent lower than the state average of 48.4 percent. In 2020 the total municipality population reached 1,828.
86.5 percent of the population had at least a high school diploma or the equivalent.
Degree distribution in Lewiston for 2020*
| Degree | Number of people | Percentage of population |
|---|---|---|
| No degree | 166 | 13.5 |
| Regular high school diploma | 269 | 21.9 |
| GED or alternative credential | 19 | 1.5 |
| Some college, less than 1 year | 113 | 9.2 |
| Some college, 1 or more years, no degree | 125 | 10.2 |
| Associate's degree | 209 | 17 |
| Bachelor's degree | 216 | 17.6 |
| Master's degree | 102 | 8.3 |
| Professional school degree | 7 | 0.6 |
| Doctorate degree | 0 | 0 |
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