This was 9.9 percent lower than the state average of 38 percent. In 2020 the total municipality population reached 8,278.
90.2 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 | 515 | 9.8 |
| Regular high school diploma | 1,634 | 30.9 |
| GED or alternative credential | 184 | 3.5 |
| Some college, less than 1 year | 604 | 11.4 |
| Some college, 1 or more years, no degree | 858 | 16.2 |
| Associate's degree | 580 | 11 |
| Bachelor's degree | 620 | 11.7 |
| Master's degree | 259 | 4.9 |
| Professional school degree | 22 | 0.4 |
| Doctorate degree | 4 | less than 0.1 |
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