This was 15.4 percent lower than the state average of 42.7 percent. In 2020 the total municipality population reached 2,803.
83 percent of the population had at least a high school diploma or the equivalent.
Degree distribution in Janesville CDP for 2020*
| Degree | Number of people | Percentage of population |
|---|---|---|
| No degree | 378 | 17 |
| Regular high school diploma | 410 | 18.4 |
| GED or alternative credential | 116 | 5.2 |
| Some college, less than 1 year | 220 | 9.9 |
| Some college, 1 or more years, no degree | 492 | 22.1 |
| Associate's degree | 227 | 10.2 |
| Bachelor's degree | 332 | 14.9 |
| Master's degree | 22 | 1 |
| Professional school degree | 6 | 0.3 |
| Doctorate degree | 20 | 0.9 |
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