This was 33.2 percent lower than the state average of 41.8 percent. In 2020 the total municipality population reached 122.
87.1 percent of the population had at least a high school diploma or the equivalent.
Degree distribution in Gilmanton for 2020*
| Degree | Number of people | Percentage of population |
|---|---|---|
| No degree | 12 | 12.9 |
| Regular high school diploma | 59 | 63.4 |
| GED or alternative credential | 4 | 4.3 |
| Some college, less than 1 year | 3 | 3.2 |
| Some college, 1 or more years, no degree | 7 | 7.5 |
| Associate's degree | 5 | 5.4 |
| Bachelor's degree | 3 | 3.2 |
| Master's degree | 0 | 0 |
| Professional school degree | 0 | 0 |
| Doctorate degree | 0 | 0 |
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