This was 21 percent lower than the state average of 42.7 percent. In 2020 the total municipality population reached 180.
86 percent of the population had at least a high school diploma or the equivalent.
Degree distribution in Grenola for 2020*
| Degree | Number of people | Percentage of population |
|---|---|---|
| No degree | 20 | 14 |
| Regular high school diploma | 36 | 25.2 |
| GED or alternative credential | 15 | 10.5 |
| Some college, less than 1 year | 26 | 18.2 |
| Some college, 1 or more years, no degree | 15 | 10.5 |
| Associate's degree | 5 | 3.5 |
| Bachelor's degree | 6 | 4.2 |
| Master's degree | 18 | 12.6 |
| Professional school degree | 0 | 0 |
| Doctorate degree | 2 | 1.4 |
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