This was 5.1 percent lower than the state average of 43.7 percent. In 2020 the total municipality population reached 2,780.
94.7 percent of the population had at least a high school diploma or the equivalent.
Degree distribution in Lena for 2020*
| Degree | Number of people | Percentage of population |
|---|---|---|
| No degree | 107 | 5.3 |
| Regular high school diploma | 577 | 28.8 |
| GED or alternative credential | 68 | 3.4 |
| Some college, less than 1 year | 169 | 8.4 |
| Some college, 1 or more years, no degree | 309 | 15.4 |
| Associate's degree | 210 | 10.5 |
| Bachelor's degree | 351 | 17.5 |
| Master's degree | 150 | 7.5 |
| Professional school degree | 54 | 2.7 |
| Doctorate degree | 9 | 0.4 |
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