This was 8.4 percent lower than the state average of 38 percent. In 2020 the total municipality population reached 17,312.
87.2 percent of the population had at least a high school diploma or the equivalent.
Degree distribution in Hannibal for 2020*
| Degree | Number of people | Percentage of population |
|---|---|---|
| No degree | 1,462 | 12.8 |
| Regular high school diploma | 3,433 | 30.1 |
| GED or alternative credential | 598 | 5.2 |
| Some college, less than 1 year | 892 | 7.8 |
| Some college, 1 or more years, no degree | 1,659 | 14.5 |
| Associate's degree | 722 | 6.3 |
| Bachelor's degree | 1,801 | 15.8 |
| Master's degree | 653 | 5.7 |
| Professional school degree | 129 | 1.1 |
| Doctorate degree | 72 | 0.6 |
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