This was 2.6 percent lower than the state average of 46.3 percent. In 2020 the total municipality population reached 943.
95.1 percent of the population had at least a high school diploma or the equivalent.
Degree distribution in Portville for 2020*
| Degree | Number of people | Percentage of population |
|---|---|---|
| No degree | 31 | 4.9 |
| Regular high school diploma | 200 | 31.3 |
| GED or alternative credential | 8 | 1.3 |
| Some college, less than 1 year | 21 | 3.3 |
| Some college, 1 or more years, no degree | 99 | 15.5 |
| Associate's degree | 127 | 19.9 |
| Bachelor's degree | 76 | 11.9 |
| Master's degree | 68 | 10.7 |
| Professional school degree | 2 | 0.3 |
| Doctorate degree | 6 | 0.9 |
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