This was 2.4 percent higher than the state average of 41 percent. In 2020 the total municipality population reached 2,642.
95.7 percent of the population had at least a high school diploma or the equivalent.
Degree distribution in Hallam for 2020*
| Degree | Number of people | Percentage of population |
|---|---|---|
| No degree | 81 | 4.3 |
| Regular high school diploma | 540 | 28.5 |
| GED or alternative credential | 126 | 6.6 |
| Some college, less than 1 year | 104 | 5.5 |
| Some college, 1 or more years, no degree | 222 | 11.7 |
| Associate's degree | 362 | 19.1 |
| Bachelor's degree | 400 | 21.1 |
| Master's degree | 15 | 0.8 |
| Professional school degree | 0 | 0 |
| Doctorate degree | 46 | 2.4 |
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