This was 25.1 percent lower than the state average of 43.7 percent. In 2020 the total municipality population reached 1,061.
90.4 percent of the population had at least a high school diploma or the equivalent.
Degree distribution in South Pekin for 2020*
| Degree | Number of people | Percentage of population |
|---|---|---|
| No degree | 61 | 9.6 |
| Regular high school diploma | 220 | 34.7 |
| GED or alternative credential | 58 | 9.1 |
| Some college, less than 1 year | 80 | 12.6 |
| Some college, 1 or more years, no degree | 97 | 15.3 |
| Associate's degree | 91 | 14.4 |
| Bachelor's degree | 18 | 2.8 |
| Master's degree | 9 | 1.4 |
| Professional school degree | 0 | 0 |
| Doctorate degree | 0 | 0 |
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