This was 29.1 percent lower than the state average of 36 percent. In 2020 the total municipality population reached 280.
88.7 percent of the population had at least a high school diploma or the equivalent.
Degree distribution in Arlington for 2020*
| Degree | Number of people | Percentage of population |
|---|---|---|
| No degree | 26 | 11.3 |
| Regular high school diploma | 142 | 61.5 |
| GED or alternative credential | 19 | 8.2 |
| Some college, less than 1 year | 10 | 4.3 |
| Some college, 1 or more years, no degree | 18 | 7.8 |
| Associate's degree | 9 | 3.9 |
| Bachelor's degree | 7 | 3 |
| Master's degree | 0 | 0 |
| Professional school degree | 0 | 0 |
| Doctorate degree | 0 | 0 |
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