This was 10.7 percent higher than the state average of 37.7 percent. In 2020 the total municipality population reached 13,201.
92.9 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 | 691 | 7.1 |
| Regular high school diploma | 2,050 | 21 |
| GED or alternative credential | 164 | 1.7 |
| Some college, less than 1 year | 941 | 9.6 |
| Some college, 1 or more years, no degree | 1,197 | 12.3 |
| Associate's degree | 1,269 | 13 |
| Bachelor's degree | 2,290 | 23.4 |
| Master's degree | 799 | 8.2 |
| Professional school degree | 214 | 2.2 |
| Doctorate degree | 152 | 1.6 |
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