This was 12.1 percent lower than the state average of 41.1 percent. In 2020 the total municipality population reached 3,858.
86.6 percent of the population had at least a high school diploma or the equivalent.
Degree distribution in Rock Valley for 2020*
| Degree | Number of people | Percentage of population |
|---|---|---|
| No degree | 307 | 13.4 |
| Regular high school diploma | 807 | 35.3 |
| GED or alternative credential | 39 | 1.7 |
| Some college, less than 1 year | 114 | 5 |
| Some college, 1 or more years, no degree | 356 | 15.6 |
| Associate's degree | 323 | 14.1 |
| Bachelor's degree | 265 | 11.6 |
| Master's degree | 67 | 2.9 |
| Professional school degree | 9 | 0.4 |
| Doctorate degree | 0 | 0 |

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