This was 17.3 percent lower than the state average of 31.4 percent. In 2020 the total municipality population reached 1,733.
76.8 percent of the population had at least a high school diploma or the equivalent.
Degree distribution in Oak Grove for 2020*
| Degree | Number of people | Percentage of population |
|---|---|---|
| No degree | 286 | 23.2 |
| Regular high school diploma | 482 | 39.1 |
| GED or alternative credential | 51 | 4.1 |
| Some college, less than 1 year | 30 | 2.4 |
| Some college, 1 or more years, no degree | 211 | 17.1 |
| Associate's degree | 39 | 3.2 |
| Bachelor's degree | 51 | 4.1 |
| Master's degree | 79 | 6.4 |
| Professional school degree | 5 | 0.4 |
| Doctorate degree | 0 | 0 |
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