This was 17.5 percent lower than the state average of 34.4 percent. In 2020 the total municipality population reached 136.
98.6 percent of the population had at least a high school diploma or the equivalent.
Degree distribution in Horntown for 2020*
| Degree | Number of people | Percentage of population |
|---|---|---|
| No degree | 1 | 1.4 |
| Regular high school diploma | 33 | 46.5 |
| GED or alternative credential | 5 | 7 |
| Some college, less than 1 year | 7 | 9.9 |
| Some college, 1 or more years, no degree | 13 | 18.3 |
| Associate's degree | 8 | 11.3 |
| Bachelor's degree | 2 | 2.8 |
| Master's degree | 1 | 1.4 |
| Professional school degree | 1 | 1.4 |
| Doctorate degree | 0 | 0 |
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