This was 30.2 percent lower than the state average of 38 percent. In 2020 the total municipality population reached 151.
89.2 percent of the population had at least a high school diploma or the equivalent.
Degree distribution in Gravois Mills for 2020*
| Degree | Number of people | Percentage of population |
|---|---|---|
| No degree | 11 | 10.8 |
| Regular high school diploma | 51 | 50 |
| GED or alternative credential | 15 | 14.7 |
| Some college, less than 1 year | 10 | 9.8 |
| Some college, 1 or more years, no degree | 7 | 6.9 |
| Associate's degree | 8 | 7.8 |
| Bachelor's degree | 0 | 0 |
| Master's degree | 0 | 0 |
| Professional school degree | 0 | 0 |
| Doctorate degree | 0 | 0 |

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