This was 19.8 percent lower than the state average of 38 percent. In 2020 the total municipality population reached 174.
81.8 percent of the population had at least a high school diploma or the equivalent.
Degree distribution in Rockville for 2020*
| Degree | Number of people | Percentage of population |
|---|---|---|
| No degree | 22 | 18.2 |
| Regular high school diploma | 24 | 19.8 |
| GED or alternative credential | 0 | 0 |
| Some college, less than 1 year | 39 | 32.2 |
| Some college, 1 or more years, no degree | 14 | 11.6 |
| Associate's degree | 1 | 0.8 |
| Bachelor's degree | 4 | 3.3 |
| Master's degree | 17 | 14 |
| Professional school degree | 0 | 0 |
| Doctorate degree | 0 | 0 |
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