This was 14.4 percent lower than the state average of 44.7 percent. In 2020 the total municipality population reached 387.
96.9 percent of the population had at least a high school diploma or the equivalent.
Degree distribution in Mayfield for 2020*
| Degree | Number of people | Percentage of population |
|---|---|---|
| No degree | 8 | 3.1 |
| Regular high school diploma | 67 | 26.4 |
| GED or alternative credential | 4 | 1.6 |
| Some college, less than 1 year | 29 | 11.4 |
| Some college, 1 or more years, no degree | 69 | 27.2 |
| Associate's degree | 26 | 10.2 |
| Bachelor's degree | 32 | 12.6 |
| Master's degree | 14 | 5.5 |
| Professional school degree | 0 | 0 |
| Doctorate degree | 5 | 2 |
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