This was 11.3 percent lower than the state average of 42.7 percent. In 2020 the total municipality population reached 2,070.
90.6 percent of the population had at least a high school diploma or the equivalent.
Degree distribution in Oakley for 2020*
| Degree | Number of people | Percentage of population |
|---|---|---|
| No degree | 137 | 9.4 |
| Regular high school diploma | 354 | 24.2 |
| GED or alternative credential | 75 | 5.1 |
| Some college, less than 1 year | 160 | 10.9 |
| Some college, 1 or more years, no degree | 277 | 18.9 |
| Associate's degree | 234 | 16 |
| Bachelor's degree | 170 | 11.6 |
| Master's degree | 33 | 2.3 |
| Professional school degree | 23 | 1.6 |
| Doctorate degree | 0 | 0 |
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