This was 19.2 percent higher than the state average of 37.7 percent. In 2020 the total municipality population reached 35,442.
96.1 percent of the population had at least a high school diploma or the equivalent.
Degree distribution in Gahanna for 2020*
| Degree | Number of people | Percentage of population |
|---|---|---|
| No degree | 972 | 3.9 |
| Regular high school diploma | 4,741 | 19 |
| GED or alternative credential | 468 | 1.9 |
| Some college, less than 1 year | 1,219 | 4.9 |
| Some college, 1 or more years, no degree | 3,331 | 13.4 |
| Associate's degree | 2,082 | 8.4 |
| Bachelor's degree | 7,603 | 30.5 |
| Master's degree | 3,406 | 13.7 |
| Professional school degree | 819 | 3.3 |
| Doctorate degree | 277 | 1.1 |
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