| Index | New Castle | Indiana | National |
| Average Test Scores | 44% | 46% | 48% |
| Student/Teacher ratio | 15:1 | 22:1 | 16:1 |
| Total public schools | 11 | 1,755 | 79,221 |
| Total private schools | 1 | 675 | 24,874 |
| Total post-secondary schools | n/a | 141 | 7,963 |
| Index | New Castle | Indiana | National |
| Completed 8th grade | 78.3% | 84.6% | 84.3% |
| Completed high school | 75.9% | 82.9% | 83.0% |
| Completed some college | 42.2% | 53.8% | 59.4% |
| Completed associate degree | 20.5% | 33.0% | 38.5% |
| Completed bachelors | 13.1% | 24.6% | 30.3% |
| Completed masters | 3.9% | 8.9% | 11.5% |
| Completed professional degree | 0.7% | 2.4% | 3.3% |
| Completed doctorate | 0.2% | 1.0% | 1.3% |
There are a total of 11 public schools, 1 private schools and n/a post-secondary schools in New Castle. Using the proficiency score averages, the average test scores for New Castle, IN schools is 44%. The average student to teacher ratio is 15:1. In New Castle, IN, an average of 78.3% of students have completed 8th grade and an average of 75.9% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Middletown, IN | 2,534 | 55% | 13.9% |
| Hagerstown, IN | 2,047 | 49% | 1.6% |
| Knightstown, IN | 2,307 | 48% | 0.3% |
| Daleville, IN | 1,607 | 46% | 3.6% |
| Straughn, IN | 256 | 42% | 13.5% |
| New Castle, IN | 17,779 | 44% | 8.0% |
| City | Population | Avg. Test Scores | National Avg. |
| Nederland, TX | 17,748 | 58% | 21.7% |
| Pampa, TX | 17,743 | 43% | 10.1% |
| Hinsdale, IL | 17,817 | 74% | 54.7% |
| Oswego, NY | 17,822 | 46% | 3.3% |
| Sevierville, TN | 17,729 | 32% | 34.1% |
| New Castle, IN | 17,779 | 44% | 8.0% |
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