| Index | Arnold | Pennsylvania | National |
| Average Test Scores | 34% | 53% | 49% |
| 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 34%. 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, State | Population | Avg. Test Scores | National Avg. |
| Gibsonia, PA | 2,640 | 79% | 60% |
| Mars, PA | 1,415 | 77% | 57% |
| Allison Park, PA | 21,515 | 75% | 53% |
| Murrysville, PA | 20,159 | 75% | 52% |
| Level Green, PA | 3,876 | 72% | 46% |
| Arnold, PA | 5,019 | 34% | 31% |
| City, State | Population | Avg. Test Scores | National Avg. |
| Falmouth, VA | 5,018 | 77% | 56% |
| North Fond du Lac, WI | 5,020 | 30% | 40% |
| Buellton, CA | 5,021 | 58% | 18% |
| Mayville, WI | 5,016 | 50% | 2% |
| Sheldon, IA | 5,015 | 82% | 67% |
| Arnold, PA | 5,019 | 34% | 31% |
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