This was 9.9 percent lower than the state average of 43.7 percent. In 2020 the total municipality population reached 2,062.
95.1 percent of the population had at least a high school diploma or the equivalent.
Degree distribution in Willowbrook for 2020*
| Degree | Number of people | Percentage of population |
|---|---|---|
| No degree | 67 | 4.9 |
| Regular high school diploma | 560 | 41.3 |
| GED or alternative credential | 37 | 2.7 |
| Some college, less than 1 year | 53 | 3.9 |
| Some college, 1 or more years, no degree | 182 | 13.4 |
| Associate's degree | 88 | 6.5 |
| Bachelor's degree | 219 | 16.1 |
| Master's degree | 109 | 8 |
| Professional school degree | 42 | 3.1 |
| Doctorate degree | 0 | 0 |
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