This was 29.7 percent higher than the state average of 46.3 percent. In 2020 the total municipality population reached 19,254.
97.1 percent of the population had at least a high school diploma or the equivalent.
Degree distribution in Syosset for 2020*
| Degree | Number of people | Percentage of population |
|---|---|---|
| No degree | 368 | 2.9 |
| Regular high school diploma | 1,333 | 10.5 |
| GED or alternative credential | 110 | 0.9 |
| Some college, less than 1 year | 389 | 3.1 |
| Some college, 1 or more years, no degree | 842 | 6.6 |
| Associate's degree | 954 | 7.5 |
| Bachelor's degree | 4,402 | 34.7 |
| Master's degree | 2,801 | 22.1 |
| Professional school degree | 1,161 | 9.2 |
| Doctorate degree | 317 | 2.5 |
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