| Index | Portsmouth | Ohio | National |
| Average Test Scores | 53% | 61% | 48% |
| Student/Teacher ratio | 16:1 | 17:1 | 16:1 |
| Total public schools | 12 | 3,650 | 79,221 |
| Total private schools | 2 | 1,000 | 24,874 |
| Total post-secondary schools | 2 | 393 | 7,963 |
| Index | Portsmouth | Ohio | National |
| Completed 8th grade | 78.7% | 86.9% | 84.3% |
| Completed high school | 76.0% | 85.6% | 83.0% |
| Completed some college | 47.0% | 55.7% | 59.4% |
| Completed associate degree | 24.1% | 35.1% | 38.5% |
| Completed bachelors | 16.7% | 26.7% | 30.3% |
| Completed masters | 5.9% | 10.0% | 11.5% |
| Completed professional degree | 2.0% | 2.7% | 3.3% |
| Completed doctorate | 0.6% | 1.1% | 1.3% |
There are a total of 12 public schools, 2 private schools and 2 post-secondary schools in Portsmouth. Using the proficiency score averages, the average test scores for Portsmouth, OH schools is 53%. The average student to teacher ratio is 16:1. In Portsmouth, OH, an average of 78.7% of students have completed 8th grade and an average of 76.0% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Wheelersburg, OH | 6,129 | 80% | 66.7% |
| South Webster, OH | 896 | 77% | 59.4% |
| Flatwoods, KY | 7,143 | 67% | 39.6% |
| Minford, OH | 378 | 65% | 35.1% |
| Lucasville, OH | 2,030 | 62% | 29.2% |
| Portsmouth, OH | 20,094 | 53% | 9.7% |
| City | Population | Avg. Test Scores | National Avg. |
| Pittsburg, KS | 20,096 | 34% | 28.6% |
| East Northport, NY | 20,085 | 61% | 27.5% |
| Dixon, CA | 20,106 | 35% | 26.6% |
| La Cañada Flintridge, CA | 20,078 | 87% | 82.0% |
| Rocky River, OH | 20,115 | 91% | 89.6% |
| Portsmouth, OH | 20,094 | 53% | 9.7% |
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