This was 18.7 percent lower than the state average of 43.7 percent. In 2020 the total municipality population reached 160.
87.1 percent of the population had at least a high school diploma or the equivalent.
Degree distribution in St. Johns for 2020*
| Degree | Number of people | Percentage of population |
|---|---|---|
| No degree | 17 | 12.9 |
| Regular high school diploma | 41 | 31.1 |
| GED or alternative credential | 15 | 11.4 |
| Some college, less than 1 year | 6 | 4.5 |
| Some college, 1 or more years, no degree | 20 | 15.2 |
| Associate's degree | 20 | 15.2 |
| Bachelor's degree | 9 | 6.8 |
| Master's degree | 4 | 3 |
| Professional school degree | 0 | 0 |
| Doctorate degree | 0 | 0 |
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