This was 21.2 percent lower than the state average of 39.6 percent. In 2020 the total municipality population reached 224.
68 percent of the population had at least a high school diploma or the equivalent.
Degree distribution in Harrietta for 2020*
| Degree | Number of people | Percentage of population |
|---|---|---|
| No degree | 40 | 32 |
| Regular high school diploma | 25 | 20 |
| GED or alternative credential | 15 | 12 |
| Some college, less than 1 year | 6 | 4.8 |
| Some college, 1 or more years, no degree | 16 | 12.8 |
| Associate's degree | 13 | 10.4 |
| Bachelor's degree | 10 | 8 |
| Master's degree | 0 | 0 |
| Professional school degree | 0 | 0 |
| Doctorate degree | 0 | 0 |
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