This was 17.3 percent lower than the state average of 42.7 percent. In 2020 the total municipality population reached 1,362.
93.1 percent of the population had at least a high school diploma or the equivalent.
Degree distribution in Arma for 2020*
| Degree | Number of people | Percentage of population |
|---|---|---|
| No degree | 72 | 6.9 |
| Regular high school diploma | 412 | 39.5 |
| GED or alternative credential | 39 | 3.7 |
| Some college, less than 1 year | 98 | 9.4 |
| Some college, 1 or more years, no degree | 156 | 15 |
| Associate's degree | 99 | 9.5 |
| Bachelor's degree | 92 | 8.8 |
| Master's degree | 50 | 4.8 |
| Professional school degree | 20 | 1.9 |
| Doctorate degree | 4 | 0.4 |
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