This was 27.8 percent lower than the state average of 44.8 percent. In 2020 the total municipality population reached 348.
73.9 percent of the population had at least a high school diploma or the equivalent.
Degree distribution in Halliday for 2020*
| Degree | Number of people | Percentage of population |
|---|---|---|
| No degree | 57 | 26.1 |
| Regular high school diploma | 45 | 20.6 |
| GED or alternative credential | 13 | 6 |
| Some college, less than 1 year | 33 | 15.1 |
| Some college, 1 or more years, no degree | 33 | 15.1 |
| Associate's degree | 20 | 9.2 |
| Bachelor's degree | 13 | 6 |
| Master's degree | 4 | 1.8 |
| Professional school degree | 0 | 0 |
| Doctorate degree | 0 | 0 |
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