| Index | Delphos | Ohio | National |
| Average Test Scores | 82% | 61% | 48% |
| Student/Teacher ratio | 20:1 | 17:1 | 16:1 |
| Total public schools | 4 | 3,650 | 79,221 |
| Total private schools | 3 | 1,000 | 24,874 |
| Total post-secondary schools | n/a | 393 | 7,963 |
| Index | Delphos | Ohio | National |
| Completed 8th grade | 87.0% | 86.9% | 84.3% |
| Completed high school | 86.1% | 85.6% | 83.0% |
| Completed some college | 46.2% | 55.7% | 59.4% |
| Completed associate degree | 28.9% | 35.1% | 38.5% |
| Completed bachelors | 16.4% | 26.7% | 30.3% |
| Completed masters | 6.1% | 10.0% | 11.5% |
| Completed professional degree | 1.0% | 2.7% | 3.3% |
| Completed doctorate | 0.1% | 1.1% | 1.3% |
There are a total of 4 public schools, 3 private schools and n/a post-secondary schools in Delphos. Using the proficiency score averages, the average test scores for Delphos, OH schools is 82%. The average student to teacher ratio is 20:1. In Delphos, OH, an average of 87.0% of students have completed 8th grade and an average of 86.1% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Ottoville, OH | 919 | 90% | 88.0% |
| Kalida, OH | 1,679 | 88% | 83.9% |
| Fort Jennings, OH | 382 | 80% | 65.6% |
| Grover Hill, OH | 417 | 80% | 65.6% |
| Spencerville, OH | 2,204 | 79% | 64.6% |
| Delphos, OH | 7,066 | 82% | 70.1% |
| City | Population | Avg. Test Scores | National Avg. |
| Cos Cob, CT | 7,065 | 73% | 52.1% |
| Hudson Falls, NY | 7,067 | 51% | 5.7% |
| Hewlett, NY | 7,064 | 82% | 70.5% |
| Orland Hills, IL | 7,069 | 42% | 13.5% |
| Morrow, GA | 7,061 | 32% | 33.8% |
| Delphos, OH | 7,066 | 82% | 70.1% |
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