This was 7.2 percent lower than the state average of 33 percent. In 2020 the total municipality population reached 404.
83.9 percent of the population had at least a high school diploma or the equivalent.
Degree distribution in Dumas for 2020*
| Degree | Number of people | Percentage of population |
|---|---|---|
| No degree | 45 | 16.1 |
| Regular high school diploma | 70 | 25.1 |
| GED or alternative credential | 17 | 6.1 |
| Some college, less than 1 year | 26 | 9.3 |
| Some college, 1 or more years, no degree | 49 | 17.6 |
| Associate's degree | 35 | 12.5 |
| Bachelor's degree | 22 | 7.9 |
| Master's degree | 15 | 5.4 |
| Professional school degree | 0 | 0 |
| Doctorate degree | 0 | 0 |
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