This was 3.4 percent lower than the state average of 46.3 percent. In 2020 the total municipality population reached 938.
96.4 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 | 23 | 3.6 |
| Regular high school diploma | 155 | 24.4 |
| GED or alternative credential | 47 | 7.4 |
| Some college, less than 1 year | 63 | 9.9 |
| Some college, 1 or more years, no degree | 75 | 11.8 |
| Associate's degree | 151 | 23.7 |
| Bachelor's degree | 84 | 13.2 |
| Master's degree | 26 | 4.1 |
| Professional school degree | 9 | 1.4 |
| Doctorate degree | 3 | 0.5 |
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