This was 14.4 percent lower than the state average of 48.4 percent. In 2020 the total municipality population reached 258.
93.6 percent of the population had at least a high school diploma or the equivalent.
Degree distribution in Osage for 2020*
| Degree | Number of people | Percentage of population |
|---|---|---|
| No degree | 12 | 6.4 |
| Regular high school diploma | 66 | 35.1 |
| GED or alternative credential | 4 | 2.1 |
| Some college, less than 1 year | 23 | 12.2 |
| Some college, 1 or more years, no degree | 19 | 10.1 |
| Associate's degree | 26 | 13.8 |
| Bachelor's degree | 24 | 12.8 |
| Master's degree | 7 | 3.7 |
| Professional school degree | 2 | 1.1 |
| Doctorate degree | 5 | 2.7 |
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