This was 15.9 percent lower than the state average of 31.4 percent. In 2020 the total municipality population reached 7,514.
75.2 percent of the population had at least a high school diploma or the equivalent.
Degree distribution in Galliano for 2020*
| Degree | Number of people | Percentage of population |
|---|---|---|
| No degree | 1,380 | 24.8 |
| Regular high school diploma | 1,740 | 31.3 |
| GED or alternative credential | 473 | 8.5 |
| Some college, less than 1 year | 208 | 3.7 |
| Some college, 1 or more years, no degree | 900 | 16.2 |
| Associate's degree | 294 | 5.3 |
| Bachelor's degree | 438 | 7.9 |
| Master's degree | 56 | 1 |
| Professional school degree | 32 | 0.6 |
| Doctorate degree | 41 | 0.7 |
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