This was 32.6 percent higher than the state average of 40.2 percent. In 2020 the total municipality population reached 54,727.
91.4 percent of the population had at least a high school diploma or the equivalent.
Degree distribution in Brookhaven for 2020*
| Degree | Number of people | Percentage of population |
|---|---|---|
| No degree | 3,344 | 8.6 |
| Regular high school diploma | 3,951 | 10.2 |
| GED or alternative credential | 400 | 1 |
| Some college, less than 1 year | 524 | 1.4 |
| Some college, 1 or more years, no degree | 2,319 | 6 |
| Associate's degree | 1,237 | 3.2 |
| Bachelor's degree | 15,621 | 40.3 |
| Master's degree | 7,799 | 20.1 |
| Professional school degree | 2,258 | 5.8 |
| Doctorate degree | 1,335 | 3.4 |
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