This was 21.3 percent lower than the state average of 41 percent. In 2020 the total municipality population reached 495.
96.8 percent of the population had at least a high school diploma or the equivalent.
Degree distribution in Mather for 2020*
| Degree | Number of people | Percentage of population |
|---|---|---|
| No degree | 13 | 3.2 |
| Regular high school diploma | 216 | 53.9 |
| GED or alternative credential | 34 | 8.5 |
| Some college, less than 1 year | 46 | 11.5 |
| Some college, 1 or more years, no degree | 13 | 3.2 |
| Associate's degree | 35 | 8.7 |
| Bachelor's degree | 35 | 8.7 |
| Master's degree | 5 | 1.2 |
| Professional school degree | 0 | 0 |
| Doctorate degree | 4 | 1 |
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