This was 17.2 percent higher than the state average of 46.3 percent. In 2020 the total municipality population reached 36,903.
97 percent of the population had at least a high school diploma or the equivalent.
Degree distribution in Commack for 2020*
| Degree | Number of people | Percentage of population |
|---|---|---|
| No degree | 765 | 3 |
| Regular high school diploma | 4,365 | 17.2 |
| GED or alternative credential | 258 | 1 |
| Some college, less than 1 year | 1,311 | 5.2 |
| Some college, 1 or more years, no degree | 2,560 | 10.1 |
| Associate's degree | 2,384 | 9.4 |
| Bachelor's degree | 7,346 | 29 |
| Master's degree | 4,901 | 19.3 |
| Professional school degree | 1,009 | 4 |
| Doctorate degree | 438 | 1.7 |
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