This was 11.5 percent lower than the state average of 41.1 percent. In 2020 the total municipality population reached 1,736.
95.7 percent of the population had at least a high school diploma or the equivalent.
Degree distribution in Greenfield for 2020*
| Degree | Number of people | Percentage of population |
|---|---|---|
| No degree | 53 | 4.3 |
| Regular high school diploma | 555 | 44.8 |
| GED or alternative credential | 21 | 1.7 |
| Some college, less than 1 year | 141 | 11.4 |
| Some college, 1 or more years, no degree | 102 | 8.2 |
| Associate's degree | 167 | 13.5 |
| Bachelor's degree | 86 | 6.9 |
| Master's degree | 68 | 5.5 |
| Professional school degree | 21 | 1.7 |
| Doctorate degree | 25 | 2 |
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