| Index | Gardiner | New York | National |
| Average Test Scores | n/a | 56% | 48% |
| Student/Teacher ratio | n/a | n/a | 16:1 |
| Total public schools | n/a | 4,060 | 79,221 |
| Total private schools | n/a | 1,092 | 24,874 |
| Total post-secondary schools | n/a | 483 | 7,963 |

| Index | Gardiner | New York | National |
| Completed 8th grade | 88.6% | 83.5% | 84.3% |
| Completed high school | 85.4% | 82.1% | 83.0% |
| Completed some college | 65.7% | 59.5% | 59.4% |
| Completed associate degree | 39.9% | 43.4% | 38.5% |
| Completed bachelors | 31.1% | 34.7% | 30.3% |
| Completed masters | 21.2% | 15.1% | 11.5% |
| Completed professional degree | 2.8% | 4.2% | 3.3% |
| Completed doctorate | 0.0% | 1.5% | 1.3% |
There are a total of n/a public schools, n/a private schools and n/a post-secondary schools in Gardiner. Using the proficiency score averages, the average test scores for Gardiner, NY schools is n/a. The average student to teacher ratio is n/a. In Gardiner, NY, an average of 88.6% of students have completed 8th grade and an average of 85.4% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| New Paltz, NY | 7,452 | 64% | 32.3% |
| Montgomery, NY | 4,641 | 62% | 29.7% |
| Stone Ridge, NY | 2,627 | 62% | 29.2% |
| Marlboro, NY | 3,865 | 59% | 23.3% |
| Wallkill, NY | 2,066 | 59% | 22.9% |
| Gardiner, NY | 1,312 | n/a |
| City | Population | Avg. Test Scores | National Avg. |
| Bradford Woods, PA | 1,312 | 89% | 85.4% |
| Stanberry, MO | 1,312 | 53% | 9.9% |
| Delevan, NY | 1,313 | 60% | 24.0% |
| Lonaconing, MD | 1,313 | 39% | 18.8% |
| Weidman, MI | 1,313 | 57% | 18.8% |
| Gardiner, NY | 1,312 | n/a |