This was 26.6 percent lower than the state average of 41.1 percent. In 2020 the total municipality population reached 2,528.
68.1 percent of the population had at least a high school diploma or the equivalent.
Degree distribution in Postville for 2020*
| Degree | Number of people | Percentage of population |
|---|---|---|
| No degree | 438 | 31.9 |
| Regular high school diploma | 408 | 29.8 |
| GED or alternative credential | 73 | 5.3 |
| Some college, less than 1 year | 61 | 4.4 |
| Some college, 1 or more years, no degree | 192 | 14 |
| Associate's degree | 75 | 5.5 |
| Bachelor's degree | 86 | 6.3 |
| Master's degree | 13 | 0.9 |
| Professional school degree | 23 | 1.7 |
| Doctorate degree | 2 | 0.1 |
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