This was 13.1 percent higher than the state average of 41.8 percent. In 2020 the total municipality population reached 4,573.
96 percent of the population had at least a high school diploma or the equivalent.
Degree distribution in Lake Wisconsin for 2020*
| Degree | Number of people | Percentage of population |
|---|---|---|
| No degree | 139 | 4 |
| Regular high school diploma | 687 | 19.9 |
| GED or alternative credential | 67 | 1.9 |
| Some college, less than 1 year | 198 | 5.7 |
| Some college, 1 or more years, no degree | 466 | 13.5 |
| Associate's degree | 501 | 14.5 |
| Bachelor's degree | 839 | 24.3 |
| Master's degree | 447 | 12.9 |
| Professional school degree | 65 | 1.9 |
| Doctorate degree | 46 | 1.3 |
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