This was 20 percent lower than the state average of 34.4 percent. In 2020 the total municipality population reached 827.
80.5 percent of the population had at least a high school diploma or the equivalent.
Degree distribution in Rock Island for 2020*
| Degree | Number of people | Percentage of population |
|---|---|---|
| No degree | 110 | 19.5 |
| Regular high school diploma | 200 | 35.5 |
| GED or alternative credential | 49 | 8.7 |
| Some college, less than 1 year | 49 | 8.7 |
| Some college, 1 or more years, no degree | 75 | 13.3 |
| Associate's degree | 22 | 3.9 |
| Bachelor's degree | 37 | 6.6 |
| Master's degree | 17 | 3 |
| Professional school degree | 5 | 0.9 |
| Doctorate degree | 0 | 0 |
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