This was 15.8 percent lower than the state average of 39.6 percent. In 2020 the total municipality population reached 1,555.
81.2 percent of the population had at least a high school diploma or the equivalent.
Degree distribution in Mio for 2020*
| Degree | Number of people | Percentage of population |
|---|---|---|
| No degree | 203 | 18.8 |
| Regular high school diploma | 304 | 28.1 |
| GED or alternative credential | 46 | 4.3 |
| Some college, less than 1 year | 136 | 12.6 |
| Some college, 1 or more years, no degree | 134 | 12.4 |
| Associate's degree | 76 | 7 |
| Bachelor's degree | 83 | 7.7 |
| Master's degree | 93 | 8.6 |
| Professional school degree | 5 | 0.5 |
| Doctorate degree | 0 | 0 |
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