This was 20.2 percent lower than the state average of 38 percent. In 2020 the total municipality population reached 2,633.
85.3 percent of the population had at least a high school diploma or the equivalent.
Degree distribution in Marionville for 2020*
| Degree | Number of people | Percentage of population |
|---|---|---|
| No degree | 250 | 14.7 |
| Regular high school diploma | 756 | 44.5 |
| GED or alternative credential | 113 | 6.7 |
| Some college, less than 1 year | 110 | 6.5 |
| Some college, 1 or more years, no degree | 167 | 9.8 |
| Associate's degree | 87 | 5.1 |
| Bachelor's degree | 155 | 9.1 |
| Master's degree | 36 | 2.1 |
| Professional school degree | 17 | 1 |
| Doctorate degree | 7 | 0.4 |
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