| Index | Arnold | Pennsylvania | National |
| Average Test Scores | 37% | 55% | 48% |
| Student/Teacher ratio | 16:1 | 16:1 | 16:1 |
| Total public schools | 2 | 2,563 | 79,221 |
| Total private schools | n/a | 1,626 | 24,874 |
| Total post-secondary schools | n/a | 406 | 7,963 |
| Index | Arnold | Pennsylvania | National |
| Completed 8th grade | 79.0% | 86.9% | 84.3% |
| Completed high school | 77.8% | 85.6% | 83.0% |
| Completed some college | 36.9% | 53.6% | 59.4% |
| Completed associate degree | 18.8% | 37.4% | 38.5% |
| Completed bachelors | 7.2% | 29.3% | 30.3% |
| Completed masters | 2.3% | 11.5% | 11.5% |
| Completed professional degree | 0.8% | 3.3% | 3.3% |
| Completed doctorate | 0.8% | 1.4% | 1.3% |
There are a total of 2 public schools, n/a private schools and n/a post-secondary schools in Arnold. Using the proficiency score averages, the average test scores for Arnold, PA schools is 37%. The average student to teacher ratio is 16:1. In Arnold, PA, an average of 79.0% of students have completed 8th grade and an average of 77.8% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Gibsonia, PA | 2,372 | 87% | 80.7% |
| Allison Park, PA | 22,623 | 80% | 67.2% |
| Plum, PA | 27,137 | 80% | 66.1% |
| Freeport, PA | 1,805 | 78% | 63.0% |
| Murrysville, PA | 19,692 | 78% | 62.1% |
| Arnold, PA | 4,852 | 37% | 22.9% |
| City | Population | Avg. Test Scores | National Avg. |
| Manheim, PA | 4,852 | 58% | 21.1% |
| Folkston, GA | 4,853 | 42% | 12.2% |
| Big Pine Key, FL | 4,853 | 83% | 71.9% |
| Springhill, LA | 4,851 | 60% | 24.0% |
| Rochester, WA | 4,854 | 54% | 12.2% |
| Arnold, PA | 4,852 | 37% | 22.9% |
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