This was 6.4 percent lower than the state average of 43.7 percent. In 2020 the total municipality population reached 3,168.
86.9 percent of the population had at least a high school diploma or the equivalent.
Degree distribution in Galena for 2020*
| Degree | Number of people | Percentage of population |
|---|---|---|
| No degree | 314 | 13.1 |
| Regular high school diploma | 718 | 30 |
| GED or alternative credential | 54 | 2.3 |
| Some college, less than 1 year | 94 | 3.9 |
| Some college, 1 or more years, no degree | 321 | 13.4 |
| Associate's degree | 114 | 4.8 |
| Bachelor's degree | 504 | 21 |
| Master's degree | 229 | 9.6 |
| Professional school degree | 30 | 1.3 |
| Doctorate degree | 17 | 0.7 |
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