| Index | Northumberland | Pennsylvania | National |
| Average Test Scores | 54% | 55% | 48% |
| Student/Teacher ratio | 17:1 | 16:1 | 16:1 |
| Total public schools | 2 | 2,563 | 79,221 |
| Total private schools | 2 | 1,626 | 24,874 |
| Total post-secondary schools | n/a | 406 | 7,963 |
| Index | Northumberland | Pennsylvania | National |
| Completed 8th grade | 85.3% | 86.9% | 84.3% |
| Completed high school | 83.9% | 85.6% | 83.0% |
| Completed some college | 48.1% | 53.6% | 59.4% |
| Completed associate degree | 32.4% | 37.4% | 38.5% |
| Completed bachelors | 25.4% | 29.3% | 30.3% |
| Completed masters | 8.7% | 11.5% | 11.5% |
| Completed professional degree | 1.1% | 3.3% | 3.3% |
| Completed doctorate | 0.4% | 1.4% | 1.3% |
There are a total of 2 public schools, 2 private schools and n/a post-secondary schools in Northumberland. Using the proficiency score averages, the average test scores for Northumberland, PA schools is 54%. The average student to teacher ratio is 17:1. In Northumberland, PA, an average of 85.3% of students have completed 8th grade and an average of 83.9% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Lewisburg, PA | 5,730 | 76% | 57.3% |
| Danville, PA | 4,613 | 72% | 49.0% |
| Selinsgrove, PA | 5,923 | 68% | 40.6% |
| Turbotville, PA | 779 | 67% | 39.9% |
| Trevorton, PA | 1,624 | 62% | 29.2% |
| Northumberland, PA | 3,732 | 54% | 12.0% |
| City | Population | Avg. Test Scores | National Avg. |
| Larned, KS | 3,732 | 29% | 39.9% |
| Albia, IA | 3,732 | 78% | 62.5% |
| Stanley, NC | 3,734 | 42% | 13.0% |
| Collinsville, CT | 3,729 | 71% | 47.9% |
| San Andreas, CA | 3,729 | 41% | 15.6% |
| Northumberland, PA | 3,732 | 54% | 12.0% |
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