| Index | Castle Rock | Colorado | National |
| Average Test Scores | 46% | 39% | 48% |
| Student/Teacher ratio | 76:1 | 17:1 | 16:1 |
| Total public schools | 13 | 1,426 | 79,221 |
| Total private schools | 1 | 384 | 24,874 |
| Total post-secondary schools | n/a | 138 | 7,963 |
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| Index | Castle Rock | Colorado | National |
| Completed 8th grade | 94.9% | 87.9% | 84.3% |
| Completed high school | 94.7% | 87.1% | 83.0% |
| Completed some college | 82.4% | 69.3% | 59.4% |
| Completed associate degree | 58.8% | 47.1% | 38.5% |
| Completed bachelors | 48.5% | 38.7% | 30.3% |
| Completed masters | 15.2% | 14.3% | 11.5% |
| Completed professional degree | 3.2% | 3.9% | 3.3% |
| Completed doctorate | 1.3% | 1.6% | 1.3% |
There are a total of 13 public schools, 1 private schools and n/a post-secondary schools in Castle Rock. Using the proficiency score averages, the average test scores for Castle Rock, CO schools is 46%. The average student to teacher ratio is 76:1. In Castle Rock, CO, an average of 94.9% of students have completed 8th grade and an average of 94.7% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Lone Tree, CO | 13,829 | 62% | 29.7% |
| Highlands Ranch, CO | 110,471 | 62% | 28.2% |
| Castle Pines, CO | 11,238 | 61% | 26.0% |
| Franktown, CO | 221 | 60% | 24.5% |
| Littleton, CO | 47,719 | 54% | 11.7% |
| Castle Rock, CO | 66,953 | 46% | 5.1% |
| City | Population | Avg. Test Scores | National Avg. |
| Bayonne, NJ | 66,963 | 47% | 1.8% |
| Santa Cruz, CA | 67,016 | 52% | 7.9% |
| Noblesville, IN | 66,802 | 59% | 22.4% |
| Schenectady, NY | 66,726 | 47% | 2.2% |
| Harlingen, TX | 66,722 | 48% | 0.7% |
| Castle Rock, CO | 66,953 | 46% | 5.1% |
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