This was 2.7 percent higher than the state average of 46.3 percent. In 2020 the total municipality population reached 18,953.
97 percent of the population had at least a high school diploma or the equivalent.
Degree distribution in Ronkonkoma for 2020*
| Degree | Number of people | Percentage of population |
|---|---|---|
| No degree | 388 | 3 |
| Regular high school diploma | 3,488 | 26.7 |
| GED or alternative credential | 198 | 1.5 |
| Some college, less than 1 year | 934 | 7.1 |
| Some college, 1 or more years, no degree | 1,666 | 12.7 |
| Associate's degree | 1,428 | 10.9 |
| Bachelor's degree | 2,805 | 21.5 |
| Master's degree | 1,574 | 12 |
| Professional school degree | 511 | 3.9 |
| Doctorate degree | 82 | 0.6 |
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