This was 19.9 percent lower than the state average of 37.7 percent. In 2020 the total municipality population reached 221.
85.9 percent of the population had at least a high school diploma or the equivalent.
Degree distribution in South Salem for 2020*
| Degree | Number of people | Percentage of population |
|---|---|---|
| No degree | 19 | 14.1 |
| Regular high school diploma | 50 | 37 |
| GED or alternative credential | 15 | 11.1 |
| Some college, less than 1 year | 5 | 3.7 |
| Some college, 1 or more years, no degree | 22 | 16.3 |
| Associate's degree | 3 | 2.2 |
| Bachelor's degree | 16 | 11.9 |
| Master's degree | 5 | 3.7 |
| Professional school degree | 0 | 0 |
| Doctorate degree | 0 | 0 |
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