This was 10.4 percent lower than the state average of 39.6 percent. In 2020 the total municipality population reached 1,347.
91.7 percent of the population had at least a high school diploma or the equivalent.
Degree distribution in Three Oaks for 2020*
| Degree | Number of people | Percentage of population |
|---|---|---|
| No degree | 74 | 8.3 |
| Regular high school diploma | 238 | 26.6 |
| GED or alternative credential | 39 | 4.4 |
| Some college, less than 1 year | 148 | 16.6 |
| Some college, 1 or more years, no degree | 134 | 15 |
| Associate's degree | 83 | 9.3 |
| Bachelor's degree | 110 | 12.3 |
| Master's degree | 41 | 4.6 |
| Professional school degree | 18 | 2 |
| Doctorate degree | 9 | 1 |
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