This was 13.3 percent lower than the state average of 41.8 percent. In 2020 the total municipality population reached 435.
91.2 percent of the population had at least a high school diploma or the equivalent.
Degree distribution in Clayton for 2020*
| Degree | Number of people | Percentage of population |
|---|---|---|
| No degree | 24 | 8.8 |
| Regular high school diploma | 102 | 37.2 |
| GED or alternative credential | 11 | 4 |
| Some college, less than 1 year | 17 | 6.2 |
| Some college, 1 or more years, no degree | 42 | 15.3 |
| Associate's degree | 25 | 9.1 |
| Bachelor's degree | 37 | 13.5 |
| Master's degree | 16 | 5.8 |
| Professional school degree | 0 | 0 |
| Doctorate degree | 0 | 0 |
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