| Index | Markham | Illinois | National |
| Average Test Scores | 16% | 33% | 48% |
| Student/Teacher ratio | 16:1 | 18:1 | 16:1 |
| Total public schools | 5 | 3,938 | 79,221 |
| Total private schools | 1 | 1,438 | 24,874 |
| Total post-secondary schools | n/a | 306 | 7,963 |
| Index | Markham | Illinois | National |
| Completed 8th grade | 80.3% | 86.2% | 84.3% |
| Completed high school | 79.5% | 84.7% | 83.0% |
| Completed some college | 48.6% | 61.8% | 59.4% |
| Completed associate degree | 21.1% | 40.7% | 38.5% |
| Completed bachelors | 12.9% | 32.9% | 30.3% |
| Completed masters | 4.7% | 12.7% | 11.5% |
| Completed professional degree | 0.7% | 3.4% | 3.3% |
| Completed doctorate | 0.3% | 1.2% | 1.3% |
There are a total of 5 public schools, 1 private schools and n/a post-secondary schools in Markham. Using the proficiency score averages, the average test scores for Markham, IL schools is 16%. The average student to teacher ratio is 16:1. In Markham, IL, an average of 80.3% of students have completed 8th grade and an average of 79.5% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Clarendon Hills, IL | 8,834 | 77% | 59.4% |
| Hinsdale, IL | 17,366 | 74% | 54.7% |
| Western Springs, IL | 13,247 | 74% | 54.4% |
| Munster, IN | 22,604 | 70% | 46.0% |
| Dyer, IN | 15,933 | 64% | 33.3% |
| Markham, IL | 12,401 | 16% | 66.3% |
| City | Population | Avg. Test Scores | National Avg. |
| Irmo, SC | 12,397 | 59% | 22.6% |
| Patchogue, NY | 12,389 | 20% | 57.4% |
| Derby, CT | 12,420 | 37% | 24.0% |
| North St. Paul, MN | 12,421 | 44% | 7.9% |
| New Kensington, PA | 12,378 | 40% | 17.7% |
| Markham, IL | 12,401 | 16% | 66.3% |
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