This was 31.5 percent lower than the state average of 43.7 percent. In 2020 the total municipality population reached 243.
87.2 percent of the population had at least a high school diploma or the equivalent.
Degree distribution in Mason for 2020*
| Degree | Number of people | Percentage of population |
|---|---|---|
| No degree | 24 | 12.8 |
| Regular high school diploma | 87 | 46.3 |
| GED or alternative credential | 10 | 5.3 |
| Some college, less than 1 year | 29 | 15.4 |
| Some college, 1 or more years, no degree | 15 | 8 |
| Associate's degree | 15 | 8 |
| Bachelor's degree | 7 | 3.7 |
| Master's degree | 1 | 0.5 |
| Professional school degree | 0 | 0 |
| Doctorate degree | 0 | 0 |
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