| Index | Duncannon | Pennsylvania | National |
| Average Test Scores | 55% | 55% | 48% |
| Student/Teacher ratio | 15:1 | 16:1 | 16:1 |
| Total public schools | 3 | 2,563 | 79,221 |
| Total private schools | n/a | 1,626 | 24,874 |
| Total post-secondary schools | n/a | 406 | 7,963 |
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| Index | Duncannon | Pennsylvania | National |
| Completed 8th grade | 79.1% | 86.9% | 84.3% |
| Completed high school | 78.8% | 85.6% | 83.0% |
| Completed some college | 41.5% | 53.6% | 59.4% |
| Completed associate degree | 24.6% | 37.4% | 38.5% |
| Completed bachelors | 16.0% | 29.3% | 30.3% |
| Completed masters | 5.1% | 11.5% | 11.5% |
| Completed professional degree | 0.6% | 3.3% | 3.3% |
| Completed doctorate | 0.0% | 1.4% | 1.3% |
There are a total of 3 public schools, n/a private schools and n/a post-secondary schools in Duncannon. Using the proficiency score averages, the average test scores for Duncannon, PA schools is 55%. The average student to teacher ratio is 15:1. In Duncannon, PA, an average of 79.1% of students have completed 8th grade and an average of 78.8% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Dauphin, PA | 1,097 | 70% | 44.8% |
| Mechanicsburg, PA | 8,977 | 67% | 39.9% |
| Camp Hill, PA | 7,926 | 67% | 38.5% |
| Enola, PA | 5,980 | 65% | 35.9% |
| Millerstown, PA | 699 | 64% | 33.0% |
| Duncannon, PA | 1,305 | 55% | 13.9% |
| City | Population | Avg. Test Scores | National Avg. |
| Fraser, CO | 1,304 | 52% | 8.3% |
| Livonia, LA | 1,304 | 61% | 27.1% |
| Tatum, TX | 1,306 | 62% | 29.5% |
| Hastings, FL | 1,304 | 20% | 58.3% |
| Shell Knob, MO | 1,306 | 45% | 7.3% |
| Duncannon, PA | 1,305 | 55% | 13.9% |
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