| Index | Plain City | Ohio | National |
| Average Test Scores | 81% | 61% | 48% |
| Student/Teacher ratio | 21:1 | 17:1 | 16:1 |
| Total public schools | 4 | 3,650 | 79,221 |
| Total private schools | n/a | 1,000 | 24,874 |
| Total post-secondary schools | n/a | 393 | 7,963 |
| Index | Plain City | Ohio | National |
| Completed 8th grade | 86.2% | 86.9% | 84.3% |
| Completed high school | 85.9% | 85.6% | 83.0% |
| Completed some college | 60.0% | 55.7% | 59.4% |
| Completed associate degree | 37.2% | 35.1% | 38.5% |
| Completed bachelors | 30.4% | 26.7% | 30.3% |
| Completed masters | 8.3% | 10.0% | 11.5% |
| Completed professional degree | 2.7% | 2.7% | 3.3% |
| Completed doctorate | 1.1% | 1.1% | 1.3% |
There are a total of 4 public schools, n/a private schools and n/a post-secondary schools in Plain City. Using the proficiency score averages, the average test scores for Plain City, OH schools is 81%. The average student to teacher ratio is 21:1. In Plain City, OH, an average of 86.2% of students have completed 8th grade and an average of 85.9% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Ostrander, OH | 904 | 92% | 91.7% |
| Powell, OH | 13,353 | 88% | 82.9% |
| Upper Arlington, OH | 35,364 | 87% | 80.9% |
| Dublin, OH | 47,824 | 81% | 68.7% |
| Marysville, OH | 24,569 | 78% | 63.4% |
| Plain City, OH | 3,831 | 81% | 68.1% |
| City | Population | Avg. Test Scores | National Avg. |
| Catskill, NY | 3,832 | 59% | 23.6% |
| Grand Bay, AL | 3,829 | 48% | 0.3% |
| Chilton, WI | 3,829 | 40% | 16.7% |
| Rocky Ford, CO | 3,833 | 31% | 35.9% |
| Clyde, TX | 3,828 | 53% | 10.4% |
| Plain City, OH | 3,831 | 81% | 68.1% |
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