This was 9.4 percent lower than the state average of 41 percent. In 2020 the total municipality population reached 169.
96.8 percent of the population had at least a high school diploma or the equivalent.
Degree distribution in Union Dale for 2020*
| Degree | Number of people | Percentage of population |
|---|---|---|
| No degree | 5 | 3.2 |
| Regular high school diploma | 73 | 46.2 |
| GED or alternative credential | 11 | 7 |
| Some college, less than 1 year | 7 | 4.4 |
| Some college, 1 or more years, no degree | 12 | 7.6 |
| Associate's degree | 22 | 13.9 |
| Bachelor's degree | 17 | 10.8 |
| Master's degree | 10 | 6.3 |
| Professional school degree | 0 | 0 |
| Doctorate degree | 1 | 0.6 |
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