This was 13.1 percent higher than the state average of 39.6 percent. In 2020 the total municipality population reached 258.
100 percent of the population had at least a high school diploma or the equivalent.
Degree distribution in Rock River for 2020*
| Degree | Number of people | Percentage of population |
|---|---|---|
| No degree | 0 | 0 |
| Regular high school diploma | 54 | 32 |
| GED or alternative credential | 0 | 0 |
| Some college, less than 1 year | 7 | 4.1 |
| Some college, 1 or more years, no degree | 19 | 11.2 |
| Associate's degree | 5 | 3 |
| Bachelor's degree | 75 | 44.4 |
| Master's degree | 9 | 5.3 |
| Professional school degree | 0 | 0 |
| Doctorate degree | 0 | 0 |
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