| Index | Casey | Illinois | National |
| Average Test Scores | 39% | 33% | 48% |
| Student/Teacher ratio | 18:1 | 18:1 | 16:1 |
| Total public schools | 3 | 3,938 | 79,221 |
| Total private schools | n/a | 1,438 | 24,874 |
| Total post-secondary schools | n/a | 306 | 7,963 |
| Index | Casey | Illinois | National |
| Completed 8th grade | 83.6% | 86.2% | 84.3% |
| Completed high school | 82.1% | 84.7% | 83.0% |
| Completed some college | 50.2% | 61.8% | 59.4% |
| Completed associate degree | 25.3% | 40.7% | 38.5% |
| Completed bachelors | 14.9% | 32.9% | 30.3% |
| Completed masters | 5.7% | 12.7% | 11.5% |
| Completed professional degree | 1.6% | 3.4% | 3.3% |
| Completed doctorate | 0.3% | 1.2% | 1.3% |
There are a total of 3 public schools, n/a private schools and n/a post-secondary schools in Casey. Using the proficiency score averages, the average test scores for Casey, IL schools is 39%. The average student to teacher ratio is 18:1. In Casey, IL, an average of 83.6% of students have completed 8th grade and an average of 82.1% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Toledo, IL | 1,163 | 28% | 42.4% |
| Charleston, IL | 20,141 | 27% | 44.8% |
| Martinsville, IL | 1,259 | 16% | 66.7% |
| Casey, IL | 2,655 | 39% | 19.3% |
| City | Population | Avg. Test Scores | National Avg. |
| Woodstock, NY | 2,655 | 50% | 4.2% |
| Wabasha, MN | 2,655 | 63% | 31.8% |
| Fairlawn, VA | 2,656 | 77% | 60.4% |
| Guilford Center, CT | 2,653 | 81% | 67.7% |
| Rancho Santa Fe, CA | 2,657 | 85% | 76.7% |
| Casey, IL | 2,655 | 39% | 19.3% |
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