This was 15.4 percent lower than the state average of 41.1 percent. In 2020 the total municipality population reached 10,508.
65.6 percent of the population had at least a high school diploma or the equivalent.
Degree distribution in Storm Lake for 2020*
| Degree | Number of people | Percentage of population |
|---|---|---|
| No degree | 2,093 | 34.4 |
| Regular high school diploma | 1,517 | 24.9 |
| GED or alternative credential | 107 | 1.8 |
| Some college, less than 1 year | 229 | 3.8 |
| Some college, 1 or more years, no degree | 577 | 9.5 |
| Associate's degree | 536 | 8.8 |
| Bachelor's degree | 677 | 11.1 |
| Master's degree | 249 | 4.1 |
| Professional school degree | 20 | 0.3 |
| Doctorate degree | 80 | 1.3 |
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