| Index | Riverhead | New York | National |
| Average Test Scores | 36% | 56% | 48% |
| Student/Teacher ratio | n/a | n/a | 16:1 |
| Total public schools | 6 | 4,060 | 79,221 |
| Total private schools | 2 | 1,092 | 24,874 |
| Total post-secondary schools | n/a | 483 | 7,963 |
| Index | Riverhead | New York | National |
| Completed 8th grade | 81.2% | 83.5% | 84.3% |
| Completed high school | 79.4% | 82.1% | 83.0% |
| Completed some college | 48.7% | 59.5% | 59.4% |
| Completed associate degree | 30.7% | 43.4% | 38.5% |
| Completed bachelors | 18.6% | 34.7% | 30.3% |
| Completed masters | 5.1% | 15.1% | 11.5% |
| Completed professional degree | 1.1% | 4.2% | 3.3% |
| Completed doctorate | 0.4% | 1.5% | 1.3% |
There are a total of 6 public schools, 2 private schools and n/a post-secondary schools in Riverhead. Using the proficiency score averages, the average test scores for Riverhead, NY schools is 36%. The average student to teacher ratio is n/a. In Riverhead, NY, an average of 81.2% of students have completed 8th grade and an average of 79.4% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Shoreham, NY | 375 | 82% | 69.8% |
| Quogue, NY | 600 | 80% | 66.7% |
| Mattituck, NY | 4,898 | 77% | 60.4% |
| Westhampton Beach, NY | 1,869 | 73% | 51.7% |
| Brookhaven, NY | 3,203 | 66% | 37.0% |
| Riverhead, NY | 13,879 | 36% | 25.8% |
| City | Population | Avg. Test Scores | National Avg. |
| Moorestown-Lenola, NJ | 13,879 | 77% | 60.4% |
| Collingswood, NJ | 13,882 | 60% | 24.7% |
| Chesterton, IN | 13,884 | 59% | 23.4% |
| Brandermill, VA | 13,887 | 87% | 81.3% |
| Whitefish Bay, WI | 13,890 | 67% | 38.8% |
| Riverhead, NY | 13,879 | 36% | 25.8% |
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