This was 15.7 percent higher than the state average of 37.7 percent. In 2020 the total municipality population reached 9,545.
94.2 percent of the population had at least a high school diploma or the equivalent.
Degree distribution in Willoughby Hills for 2020*
| Degree | Number of people | Percentage of population |
|---|---|---|
| No degree | 431 | 5.8 |
| Regular high school diploma | 1,253 | 17 |
| GED or alternative credential | 258 | 3.5 |
| Some college, less than 1 year | 435 | 5.9 |
| Some college, 1 or more years, no degree | 1,066 | 14.4 |
| Associate's degree | 769 | 10.4 |
| Bachelor's degree | 1,634 | 22.1 |
| Master's degree | 1,148 | 15.5 |
| Professional school degree | 203 | 2.7 |
| Doctorate degree | 192 | 2.6 |
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