| Index | Gahanna | Ohio | National |
| Average Test Scores | 76% | 61% | 48% |
| Student/Teacher ratio | 14:1 | 17:1 | 16:1 |
| Total public schools | 10 | 3,650 | 79,221 |
| Total private schools | 6 | 1,000 | 24,874 |
| Total post-secondary schools | 1 | 393 | 7,963 |
| Index | Gahanna | Ohio | National |
| Completed 8th grade | 94.4% | 86.9% | 84.3% |
| Completed high school | 93.9% | 85.6% | 83.0% |
| Completed some college | 73.7% | 55.7% | 59.4% |
| Completed associate degree | 53.9% | 35.1% | 38.5% |
| Completed bachelors | 46.1% | 26.7% | 30.3% |
| Completed masters | 17.1% | 10.0% | 11.5% |
| Completed professional degree | 3.6% | 2.7% | 3.3% |
| Completed doctorate | 1.2% | 1.1% | 1.3% |
There are a total of 10 public schools, 6 private schools and 1 post-secondary schools in Gahanna. Using the proficiency score averages, the average test scores for Gahanna, OH schools is 76%. The average student to teacher ratio is 14:1. In Gahanna, OH, an average of 94.4% of students have completed 8th grade and an average of 93.9% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Galena, OH | 753 | 89% | 85.9% |
| Powell, OH | 13,353 | 88% | 82.9% |
| New Albany, OH | 11,085 | 87% | 81.3% |
| Upper Arlington, OH | 35,364 | 87% | 80.9% |
| Bexley, OH | 13,805 | 84% | 74.4% |
| Gahanna, OH | 35,442 | 76% | 58.6% |
| City | Population | Avg. Test Scores | National Avg. |
| Eagle Mountain, UT | 35,431 | 43% | 11.1% |
| Richmond, IN | 35,467 | 32% | 34.4% |
| Oswego, IL | 35,470 | 37% | 23.2% |
| Wildwood, MO | 35,476 | 63% | 30.2% |
| Inver Grove Heights, MN | 35,492 | 54% | 12.4% |
| Gahanna, OH | 35,442 | 76% | 58.6% |
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