This was 18.4 percent lower than the state average of 38 percent. In 2020 the total municipality population reached 699.
89.8 percent of the population had at least a high school diploma or the equivalent.
Degree distribution in Miller for 2020*
| Degree | Number of people | Percentage of population |
|---|---|---|
| No degree | 48 | 10.2 |
| Regular high school diploma | 215 | 45.8 |
| GED or alternative credential | 19 | 4.1 |
| Some college, less than 1 year | 44 | 9.4 |
| Some college, 1 or more years, no degree | 51 | 10.9 |
| Associate's degree | 24 | 5.1 |
| Bachelor's degree | 42 | 9 |
| Master's degree | 7 | 1.5 |
| Professional school degree | 7 | 1.5 |
| Doctorate degree | 12 | 2.6 |
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