| Index | Southold | New York | National |
| Average Test Scores | 53% | 56% | 48% |
| Student/Teacher ratio | n/a | n/a | 16:1 |
| Total public schools | 2 | 4,060 | 79,221 |
| Total private schools | n/a | 1,092 | 24,874 |
| Total post-secondary schools | n/a | 483 | 7,963 |
| Index | Southold | New York | National |
| Completed 8th grade | 95.9% | 83.5% | 84.3% |
| Completed high school | 95.9% | 82.1% | 83.0% |
| Completed some college | 69.9% | 59.5% | 59.4% |
| Completed associate degree | 50.8% | 43.4% | 38.5% |
| Completed bachelors | 37.3% | 34.7% | 30.3% |
| Completed masters | 17.6% | 15.1% | 11.5% |
| Completed professional degree | 5.2% | 4.2% | 3.3% |
| Completed doctorate | 1.0% | 1.5% | 1.3% |
There are a total of 2 public schools, n/a private schools and n/a post-secondary schools in Southold. Using the proficiency score averages, the average test scores for Southold, NY schools is 53%. The average student to teacher ratio is n/a. In Southold, NY, an average of 95.9% of students have completed 8th grade and an average of 95.9% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Mattituck, NY | 4,898 | 77% | 60.4% |
| Sag Harbor, NY | 1,959 | 65% | 34.4% |
| East Hampton, NY | 920 | 63% | 31.0% |
| Cutchogue, NY | 2,948 | 59% | 21.9% |
| Hampton Bays, NY | 14,684 | 57% | 19.1% |
| Southold, NY | 5,946 | 53% | 10.9% |
| City | Population | Avg. Test Scores | National Avg. |
| Kingston, TN | 5,946 | 41% | 15.4% |
| Geneva, OH | 5,947 | 65% | 35.9% |
| Hidden Valley Lake, CA | 5,948 | 50% | 4.2% |
| Taos, NM | 5,950 | 27% | 44.4% |
| Columbia, MS | 5,940 | 40% | 16.7% |
| Southold, NY | 5,946 | 53% | 10.9% |
Here are the best places to live in New York
These are the largest cities in New York
Check out the 10 most dangerous cities in New York
Safest States In The US