This was 15.8 percent lower than the state average of 39.6 percent. In 2020 the total municipality population reached 449.
90.9 percent of the population had at least a high school diploma or the equivalent.
Degree distribution in Galien for 2020*
| Degree | Number of people | Percentage of population |
|---|---|---|
| No degree | 28 | 9.1 |
| Regular high school diploma | 81 | 26.4 |
| GED or alternative credential | 19 | 6.2 |
| Some college, less than 1 year | 36 | 11.7 |
| Some college, 1 or more years, no degree | 70 | 22.8 |
| Associate's degree | 33 | 10.7 |
| Bachelor's degree | 29 | 9.4 |
| Master's degree | 9 | 2.9 |
| Professional school degree | 2 | 0.7 |
| Doctorate degree | 0 | 0 |
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