| Index | Cadiz | Ohio | National |
| Average Test Scores | 61% | 61% | 48% |
| Student/Teacher ratio | 17:1 | 17:1 | 16:1 |
| Total public schools | 3 | 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 | Cadiz | Ohio | National |
| Completed 8th grade | 89.7% | 86.9% | 84.3% |
| Completed high school | 86.5% | 85.6% | 83.0% |
| Completed some college | 50.7% | 55.7% | 59.4% |
| Completed associate degree | 24.6% | 35.1% | 38.5% |
| Completed bachelors | 14.0% | 26.7% | 30.3% |
| Completed masters | 5.9% | 10.0% | 11.5% |
| Completed professional degree | 0.3% | 2.7% | 3.3% |
| Completed doctorate | 0.3% | 1.1% | 1.3% |
There are a total of 3 public schools, n/a private schools and n/a post-secondary schools in Cadiz. Using the proficiency score averages, the average test scores for Cadiz, OH schools is 61%. The average student to teacher ratio is 17:1. In Cadiz, OH, an average of 89.7% of students have completed 8th grade and an average of 86.5% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| St. Clairsville, OH | 5,080 | 70% | 46.2% |
| Wintersville, OH | 3,834 | 67% | 39.6% |
| Adena, OH | 682 | 65% | 34.4% |
| Scio, OH | 718 | 65% | 34.4% |
| Bridgeport, OH | 1,652 | 63% | 30.6% |
| Cadiz, OH | 3,169 | 61% | 27.1% |
| City | Population | Avg. Test Scores | National Avg. |
| Blue Ridge, VA | 3,169 | 87% | 81.3% |
| Pickens, SC | 3,169 | 53% | 9.9% |
| Petersburg, AK | 3,170 | 60% | 24.3% |
| Bushnell, FL | 3,170 | 59% | 22.9% |
| Wimberley, TX | 3,168 | 49% | 2.1% |
| Cadiz, OH | 3,169 | 61% | 27.1% |
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