This was 5.1 percent lower than the state average of 36 percent. In 2020 the total municipality population reached 275.
90.9 percent of the population had at least a high school diploma or the equivalent.
Degree distribution in Uniondale for 2020*
| Degree | Number of people | Percentage of population |
|---|---|---|
| No degree | 15 | 9.1 |
| Regular high school diploma | 50 | 30.3 |
| GED or alternative credential | 12 | 7.3 |
| Some college, less than 1 year | 22 | 13.3 |
| Some college, 1 or more years, no degree | 15 | 9.1 |
| Associate's degree | 24 | 14.5 |
| Bachelor's degree | 21 | 12.7 |
| Master's degree | 6 | 3.6 |
| Professional school degree | 0 | 0 |
| Doctorate degree | 0 | 0 |
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