| Index | New Castle | Virginia | National |
| Average Test Scores | 75% | 79% | 48% |
| Student/Teacher ratio | n/a | 13:1 | 16:1 |
| Total public schools | n/a | 1,596 | 79,221 |
| Total private schools | n/a | 553 | 24,874 |
| Total post-secondary schools | n/a | 199 | 7,963 |
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| Index | New Castle | Virginia | National |
| Completed 8th grade | 75.5% | 85.9% | 84.3% |
| Completed high school | 75.5% | 84.7% | 83.0% |
| Completed some college | 59.1% | 64.1% | 59.4% |
| Completed associate degree | 38.2% | 44.2% | 38.5% |
| Completed bachelors | 31.8% | 36.9% | 30.3% |
| Completed masters | 2.7% | 15.7% | 11.5% |
| Completed professional degree | 2.7% | 4.2% | 3.3% |
| Completed doctorate | 0.0% | 1.7% | 1.3% |
There are a total of n/a public schools, n/a private schools and n/a post-secondary schools in New Castle. Using the proficiency score averages, the average test scores for New Castle, VA schools is 75%. The average student to teacher ratio is n/a. In New Castle, VA, an average of 75.5% of students have completed 8th grade and an average of 75.5% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Daleville, VA | 2,816 | 89% | 85.4% |
| Cloverdale, VA | 3,303 | 88% | 82.8% |
| Troutville, VA | 419 | 86% | 78.6% |
| Fincastle, VA | 735 | 86% | 78.1% |
| Salem, VA | 26,071 | 84% | 74.2% |
| New Castle, VA | 292 | 75% | 55.2% |
| City | Population | Avg. Test Scores | National Avg. |
| Buncombe, IL | 292 | 22% | 53.6% |
| Ryegate, MT | 292 | 20% | 58.3% |
| Chester, SD | 292 | 60% | 24.5% |
| Moscow, KS | 292 | 26% | 45.3% |
| Stovall, NC | 292 | 35% | 28.1% |
| New Castle, VA | 292 | 75% | 55.2% |
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