This was 18.2 percent lower than the state average of 33.6 percent. In 2020 the total municipality population reached 576.
91 percent of the population had at least a high school diploma or the equivalent.
Degree distribution in Island for 2020*
| Degree | Number of people | Percentage of population |
|---|---|---|
| No degree | 41 | 9 |
| Regular high school diploma | 179 | 39.3 |
| GED or alternative credential | 60 | 13.2 |
| Some college, less than 1 year | 39 | 8.6 |
| Some college, 1 or more years, no degree | 67 | 14.7 |
| Associate's degree | 31 | 6.8 |
| Bachelor's degree | 31 | 6.8 |
| Master's degree | 4 | 0.9 |
| Professional school degree | 4 | 0.9 |
| Doctorate degree | 0 | 0 |
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