This was 12 percent lower than the state average of 35.7 percent. In 2020 the total municipality population reached 1,233.
92.1 percent of the population had at least a high school diploma or the equivalent.
Degree distribution in Greenback for 2020*
| Degree | Number of people | Percentage of population |
|---|---|---|
| No degree | 64 | 7.9 |
| Regular high school diploma | 228 | 28.3 |
| GED or alternative credential | 60 | 7.4 |
| Some college, less than 1 year | 50 | 6.2 |
| Some college, 1 or more years, no degree | 214 | 26.5 |
| Associate's degree | 64 | 7.9 |
| Bachelor's degree | 79 | 9.8 |
| Master's degree | 31 | 3.8 |
| Professional school degree | 12 | 1.5 |
| Doctorate degree | 5 | 0.6 |
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