This was 3.3 percent lower than the state average of 43.7 percent. In 2020 the total municipality population reached 825.
94.5 percent of the population had at least a high school diploma or the equivalent.
Degree distribution in Annawan for 2020*
| Degree | Number of people | Percentage of population |
|---|---|---|
| No degree | 32 | 5.5 |
| Regular high school diploma | 181 | 31.1 |
| GED or alternative credential | 11 | 1.9 |
| Some college, less than 1 year | 28 | 4.8 |
| Some college, 1 or more years, no degree | 95 | 16.3 |
| Associate's degree | 80 | 13.7 |
| Bachelor's degree | 114 | 19.6 |
| Master's degree | 41 | 7 |
| Professional school degree | 0 | 0 |
| Doctorate degree | 0 | 0 |
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