| 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 |


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| 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 | 940 | 92% | 91.7% |
| Powell, OH | 13,792 | 88% | 82.9% |
| Upper Arlington, OH | 36,196 | 87% | 80.9% |
| Dublin, OH | 49,030 | 81% | 68.7% |
| Marysville, OH | 25,078 | 78% | 63.4% |
| Plain City, OH | 3,936 | 81% | 68.1% |
| City | Population | Avg. Test Scores | National Avg. |
| Umatilla, FL | 3,936 | 50% | 4.2% |
| Vidalia, LA | 3,933 | 66% | 37.8% |
| Cedarville, OH | 3,940 | 80% | 66.1% |
| Booneville, AR | 3,931 | 41% | 15.6% |
| Huntingdon, TN | 3,929 | 36% | 24.7% |
| Plain City, OH | 3,936 | 81% | 68.1% |