This was 13.2 percent lower than the state average of 48.4 percent. In 2020 the total municipality population reached 701.
90.1 percent of the population had at least a high school diploma or the equivalent.
Degree distribution in Heron Lake for 2020*
| Degree | Number of people | Percentage of population |
|---|---|---|
| No degree | 48 | 9.9 |
| Regular high school diploma | 151 | 31.1 |
| GED or alternative credential | 6 | 1.2 |
| Some college, less than 1 year | 50 | 10.3 |
| Some college, 1 or more years, no degree | 60 | 12.3 |
| Associate's degree | 70 | 14.4 |
| Bachelor's degree | 83 | 17.1 |
| Master's degree | 18 | 3.7 |
| Professional school degree | 0 | 0 |
| Doctorate degree | 0 | 0 |
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