This was 14.4 percent lower than the state average of 39.6 percent. In 2020 the total municipality population reached 593.
84.7 percent of the population had at least a high school diploma or the equivalent.
Degree distribution in Hillman for 2020*
| Degree | Number of people | Percentage of population |
|---|---|---|
| No degree | 74 | 15.3 |
| Regular high school diploma | 189 | 39 |
| GED or alternative credential | 21 | 4.3 |
| Some college, less than 1 year | 34 | 7 |
| Some college, 1 or more years, no degree | 45 | 9.3 |
| Associate's degree | 74 | 15.3 |
| Bachelor's degree | 31 | 6.4 |
| Master's degree | 15 | 3.1 |
| Professional school degree | 2 | 0.4 |
| Doctorate degree | 0 | 0 |
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