| 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 | 7,169 | 64% | 32.3% |
| Montgomery, NY | 4,519 | 62% | 29.7% |
| Stone Ridge, NY | 2,528 | 62% | 29.2% |
| Marlboro, NY | 3,720 | 59% | 23.3% |
| Wallkill, NY | 2,012 | 59% | 22.9% |
| Gardiner, NY | 1,275 | n/a |
| City | Population | Avg. Test Scores | National Avg. |
| Cerro Gordo, IL | 1,275 | 45% | 7.3% |
| Los Alamos, CA | 1,275 | 35% | 28.1% |
| Oglethorpe, GA | 1,274 | 19% | 60.4% |
| Ladoga, IN | 1,274 | 67% | 39.6% |
| Pomeroy, WA | 1,276 | 60% | 24.5% |
| Gardiner, NY | 1,275 | n/a |
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