This was 25.6 percent higher than the state average of 37.7 percent. In 2020 the total municipality population reached 40,443.
97.4 percent of the population had at least a high school diploma or the equivalent.
Degree distribution in Westerville for 2020*
| Degree | Number of people | Percentage of population |
|---|---|---|
| No degree | 730 | 2.6 |
| Regular high school diploma | 4,512 | 16 |
| GED or alternative credential | 272 | 1 |
| Some college, less than 1 year | 1,410 | 5 |
| Some college, 1 or more years, no degree | 3,423 | 12.1 |
| Associate's degree | 2,202 | 7.8 |
| Bachelor's degree | 9,036 | 32 |
| Master's degree | 5,106 | 18.1 |
| Professional school degree | 992 | 3.5 |
| Doctorate degree | 528 | 1.9 |
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