This was 11.5 percent lower than the state average of 40.5 percent. In 2020 the total municipality population reached 12,166.
91 percent of the population had at least a high school diploma or the equivalent.
Degree distribution in Lake for 2020*
| Degree | Number of people | Percentage of population |
|---|---|---|
| No degree | 731 | 9 |
| Regular high school diploma | 2,654 | 32.7 |
| GED or alternative credential | 454 | 5.6 |
| Some college, less than 1 year | 682 | 8.4 |
| Some college, 1 or more years, no degree | 1,249 | 15.4 |
| Associate's degree | 505 | 6.2 |
| Bachelor's degree | 1,199 | 14.8 |
| Master's degree | 480 | 5.9 |
| Professional school degree | 110 | 1.4 |
| Doctorate degree | 58 | 0.7 |
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