This was 18 percent lower than the state average of 46.3 percent. In 2020 the total municipality population reached 624.
88.6 percent of the population had at least a high school diploma or the equivalent.
Degree distribution in Sinclairville for 2020*
| Degree | Number of people | Percentage of population |
|---|---|---|
| No degree | 53 | 11.4 |
| Regular high school diploma | 208 | 44.6 |
| GED or alternative credential | 22 | 4.7 |
| Some college, less than 1 year | 25 | 5.4 |
| Some college, 1 or more years, no degree | 26 | 5.6 |
| Associate's degree | 33 | 7.1 |
| Bachelor's degree | 40 | 8.6 |
| Master's degree | 49 | 10.5 |
| Professional school degree | 8 | 1.7 |
| Doctorate degree | 2 | 0.4 |
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