This was 8.2 percent lower than the state average of 31.4 percent. In 2020 the total municipality population reached 521.
75.9 percent of the population had at least a high school diploma or the equivalent.
Degree distribution in Sun for 2020*
| Degree | Number of people | Percentage of population |
|---|---|---|
| No degree | 83 | 24.1 |
| Regular high school diploma | 109 | 31.6 |
| GED or alternative credential | 8 | 2.3 |
| Some college, less than 1 year | 15 | 4.3 |
| Some college, 1 or more years, no degree | 50 | 14.5 |
| Associate's degree | 20 | 5.8 |
| Bachelor's degree | 50 | 14.5 |
| Master's degree | 0 | 0 |
| Professional school degree | 10 | 2.9 |
| Doctorate degree | 0 | 0 |
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