This was 23.1 percent lower than the state average of 39.6 percent. In 2020 the total municipality population reached 2,034.
88 percent of the population had at least a high school diploma or the equivalent.
Degree distribution in Harrison for 2020*
| Degree | Number of people | Percentage of population |
|---|---|---|
| No degree | 196 | 12 |
| Regular high school diploma | 525 | 32.2 |
| GED or alternative credential | 169 | 10.4 |
| Some college, less than 1 year | 184 | 11.3 |
| Some college, 1 or more years, no degree | 289 | 17.7 |
| Associate's degree | 76 | 4.7 |
| Bachelor's degree | 123 | 7.5 |
| Master's degree | 54 | 3.3 |
| Professional school degree | 8 | 0.5 |
| Doctorate degree | 8 | 0.5 |
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