| Index | Lake Grove | New York | National |
| Average Test Scores | 50% | 56% | 48% |
| Student/Teacher ratio | n/a | n/a | 16:1 |
| Total public schools | 3 | 4,060 | 79,221 |
| Total private schools | 2 | 1,092 | 24,874 |
| Total post-secondary schools | n/a | 483 | 7,963 |
| Index | Lake Grove | New York | National |
| Completed 8th grade | 92.2% | 83.5% | 84.3% |
| Completed high school | 91.4% | 82.1% | 83.0% |
| Completed some college | 65.1% | 59.5% | 59.4% |
| Completed associate degree | 45.3% | 43.4% | 38.5% |
| Completed bachelors | 37.1% | 34.7% | 30.3% |
| Completed masters | 17.0% | 15.1% | 11.5% |
| Completed professional degree | 4.9% | 4.2% | 3.3% |
| Completed doctorate | 2.1% | 1.5% | 1.3% |
There are a total of 3 public schools, 2 private schools and n/a post-secondary schools in Lake Grove. Using the proficiency score averages, the average test scores for Lake Grove, NY schools is 50%. The average student to teacher ratio is n/a. In Lake Grove, NY, an average of 92.2% of students have completed 8th grade and an average of 91.4% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| West Sayville, NY | 4,956 | 82% | 69.8% |
| Shoreham, NY | 375 | 82% | 69.8% |
| Hauppauge, NY | 19,661 | 80% | 66.3% |
| Setauket-East Setauket, NY | 14,174 | 80% | 65.6% |
| Elwood, NY | 11,582 | 79% | 63.5% |
| Lake Grove, NY | 11,083 | 50% | 3.1% |
| City | Population | Avg. Test Scores | National Avg. |
| Sonoma, CA | 11,082 | 34% | 28.9% |
| New Albany, OH | 11,085 | 87% | 81.3% |
| Big Lake, MN | 11,085 | 60% | 25.0% |
| Two Rivers, WI | 11,079 | 33% | 31.7% |
| Celebration, FL | 11,077 | 64% | 32.8% |
| Lake Grove, NY | 11,083 | 50% | 3.1% |
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