| Index | Countryside | Illinois | National |
| Average Test Scores | 30% | 33% | 48% |
| Student/Teacher ratio | 15:1 | 18:1 | 16:1 |
| Total public schools | 1 | 3,938 | 79,221 |
| Total private schools | n/a | 1,438 | 24,874 |
| Total post-secondary schools | n/a | 306 | 7,963 |
| Index | Countryside | Illinois | National |
| Completed 8th grade | 91.7% | 86.2% | 84.3% |
| Completed high school | 90.6% | 84.7% | 83.0% |
| Completed some college | 60.0% | 61.8% | 59.4% |
| Completed associate degree | 34.4% | 40.7% | 38.5% |
| Completed bachelors | 27.2% | 32.9% | 30.3% |
| Completed masters | 8.5% | 12.7% | 11.5% |
| Completed professional degree | 1.8% | 3.4% | 3.3% |
| Completed doctorate | 1.0% | 1.2% | 1.3% |
There are a total of 1 public schools, n/a private schools and n/a post-secondary schools in Countryside. Using the proficiency score averages, the average test scores for Countryside, IL schools is 30%. The average student to teacher ratio is 15:1. In Countryside, IL, an average of 91.7% of students have completed 8th grade and an average of 90.6% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Oak Brook, IL | 8,085 | 79% | 64.6% |
| Clarendon Hills, IL | 8,834 | 77% | 59.4% |
| Hinsdale, IL | 17,366 | 74% | 54.7% |
| Western Springs, IL | 13,247 | 74% | 54.4% |
| River Forest, IL | 10,883 | 67% | 38.5% |
| Countryside, IL | 5,929 | 30% | 38.5% |
| City | Population | Avg. Test Scores | National Avg. |
| Roanoke, AL | 5,931 | 38% | 20.1% |
| Oxford, MA | 5,926 | 41% | 14.9% |
| Sunbury, OH | 5,934 | 79% | 65.3% |
| Old Tappan, NJ | 5,924 | 77% | 59.4% |
| Selinsgrove, PA | 5,923 | 68% | 40.6% |
| Countryside, IL | 5,929 | 30% | 38.5% |
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