This was 4.8 percent lower than the state average of 33.6 percent. In 2020 the total municipality population reached 1,411.
78.6 percent of the population had at least a high school diploma or the equivalent.
Degree distribution in Harlan for 2020*
| Degree | Number of people | Percentage of population |
|---|---|---|
| No degree | 228 | 21.4 |
| Regular high school diploma | 266 | 24.9 |
| GED or alternative credential | 69 | 6.5 |
| Some college, less than 1 year | 78 | 7.3 |
| Some college, 1 or more years, no degree | 119 | 11.2 |
| Associate's degree | 99 | 9.3 |
| Bachelor's degree | 109 | 10.2 |
| Master's degree | 64 | 6 |
| Professional school degree | 32 | 3 |
| Doctorate degree | 3 | 0.3 |
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