This was 12.1 percent lower than the state average of 33 percent. In 2020 the total municipality population reached 2,455.
81.9 percent of the population had at least a high school diploma or the equivalent.
Degree distribution in Nettleton for 2020*
| Degree | Number of people | Percentage of population |
|---|---|---|
| No degree | 283 | 18.1 |
| Regular high school diploma | 610 | 39 |
| GED or alternative credential | 115 | 7.4 |
| Some college, less than 1 year | 62 | 4 |
| Some college, 1 or more years, no degree | 166 | 10.6 |
| Associate's degree | 199 | 12.7 |
| Bachelor's degree | 65 | 4.2 |
| Master's degree | 31 | 2 |
| Professional school degree | 32 | 2 |
| Doctorate degree | 0 | 0 |
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