This was 6.9 percent higher than the state average of 46.8 percent. In 2020 the total municipality population reached 623.
97.5 percent of the population had at least a high school diploma or the equivalent.
Degree distribution in McKenna for 2020*
| Degree | Number of people | Percentage of population |
|---|---|---|
| No degree | 11 | 2.5 |
| Regular high school diploma | 69 | 15.5 |
| GED or alternative credential | 1 | 0.2 |
| Some college, less than 1 year | 72 | 16.2 |
| Some college, 1 or more years, no degree | 53 | 11.9 |
| Associate's degree | 92 | 20.7 |
| Bachelor's degree | 120 | 27 |
| Master's degree | 0 | 0 |
| Professional school degree | 27 | 6.1 |
| Doctorate degree | 0 | 0 |
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