This was 13.3 percent lower than the state average of 43.2 percent. In 2020 the total municipality population reached 374.
94.2 percent of the population had at least a high school diploma or the equivalent.
Degree distribution in Giltner for 2020*
| Degree | Number of people | Percentage of population | 
|---|---|---|
| No degree | 16 | 5.8 | 
| Regular high school diploma | 114 | 41.6 | 
| GED or alternative credential | 11 | 4 | 
| Some college, less than 1 year | 26 | 9.5 | 
| Some college, 1 or more years, no degree | 25 | 9.1 | 
| Associate's degree | 33 | 12 | 
| Bachelor's degree | 32 | 11.7 | 
| Master's degree | 17 | 6.2 | 
| Professional school degree | 0 | 0 | 
| Doctorate degree | 0 | 0 | 

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