| Index | New Castle | Colorado | National |
| Average Test Scores | 37% | 39% | 48% |
| Student/Teacher ratio | 18:1 | 17:1 | 16:1 |
| Total public schools | 2 | 1,426 | 79,221 |
| Total private schools | 1 | 384 | 24,874 |
| Total post-secondary schools | n/a | 138 | 7,963 |
| Index | New Castle | Colorado | National |
| Completed 8th grade | 83.6% | 87.9% | 84.3% |
| Completed high school | 83.6% | 87.1% | 83.0% |
| Completed some college | 68.9% | 69.3% | 59.4% |
| Completed associate degree | 39.5% | 47.1% | 38.5% |
| Completed bachelors | 29.1% | 38.7% | 30.3% |
| Completed masters | 9.2% | 14.3% | 11.5% |
| Completed professional degree | 2.0% | 3.9% | 3.3% |
| Completed doctorate | 1.7% | 1.6% | 1.3% |
There are a total of 2 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, CO schools is 37%. The average student to teacher ratio is 18:1. In New Castle, CO, an average of 83.6% of students have completed 8th grade and an average of 83.6% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Silt, CO | 3,076 | 43% | 10.4% |
| Glenwood Springs, CO | 10,048 | 31% | 34.5% |
| Rifle, CO | 9,771 | 29% | 40.4% |
| New Castle, CO | 4,877 | 37% | 24.0% |
| City | Population | Avg. Test Scores | National Avg. |
| Michigan Center, MI | 4,879 | 37% | 22.9% |
| Mayville, WI | 4,875 | 41% | 15.6% |
| Chisholm, MN | 4,879 | 51% | 6.9% |
| Mendham, NJ | 4,880 | 79% | 63.5% |
| Colorado City, AZ | 4,873 | 59% | 22.9% |
| New Castle, CO | 4,877 | 37% | 24.0% |
Here are the best places to live in Colorado
Safest States In The US
Check out the 10 most dangerous cities in Colorado
Check out the 10 safest cities in Colorado