This was 29.4 percent lower than the state average of 42.7 percent. In 2020 the total municipality population reached 24,401.
54.8 percent of the population had at least a high school diploma or the equivalent.
Degree distribution in Willowbrook CDP for 2020*
| Degree | Number of people | Percentage of population |
|---|---|---|
| No degree | 6,170 | 45.2 |
| Regular high school diploma | 3,419 | 25 |
| GED or alternative credential | 270 | 2 |
| Some college, less than 1 year | 331 | 2.4 |
| Some college, 1 or more years, no degree | 1,644 | 12 |
| Associate's degree | 626 | 4.6 |
| Bachelor's degree | 966 | 7.1 |
| Master's degree | 185 | 1.4 |
| Professional school degree | 23 | 0.2 |
| Doctorate degree | 18 | 0.1 |

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