| Index | Dupo | Illinois | National |
| Average Test Scores | 28% | 33% | 48% |
| Student/Teacher ratio | 16:1 | 18:1 | 16:1 |
| Total public schools | 3 | 3,938 | 79,221 |
| Total private schools | 1 | 1,438 | 24,874 |
| Total post-secondary schools | n/a | 306 | 7,963 |
| Index | Dupo | Illinois | National |
| Completed 8th grade | 84.0% | 86.2% | 84.3% |
| Completed high school | 84.0% | 84.7% | 83.0% |
| Completed some college | 54.8% | 61.8% | 59.4% |
| Completed associate degree | 22.9% | 40.7% | 38.5% |
| Completed bachelors | 11.8% | 32.9% | 30.3% |
| Completed masters | 5.1% | 12.7% | 11.5% |
| Completed professional degree | 0.7% | 3.4% | 3.3% |
| Completed doctorate | 0.0% | 1.2% | 1.3% |
There are a total of 3 public schools, 1 private schools and n/a post-secondary schools in Dupo. Using the proficiency score averages, the average test scores for Dupo, IL schools is 28%. The average student to teacher ratio is 16:1. In Dupo, IL, an average of 84.0% of students have completed 8th grade and an average of 84.0% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Clayton, MO | 16,763 | 73% | 52.7% |
| Brentwood, MO | 7,986 | 70% | 45.6% |
| Olivette, MO | 7,837 | 70% | 44.8% |
| Kirkwood, MO | 27,772 | 69% | 43.1% |
| Maryville, IL | 7,962 | 65% | 34.4% |
| Dupo, IL | 3,917 | 28% | 42.4% |
| City | Population | Avg. Test Scores | National Avg. |
| Oliver Springs, TN | 3,918 | 28% | 42.7% |
| Citronelle, AL | 3,919 | 34% | 29.9% |
| Williamstown, KY | 3,914 | 44% | 8.1% |
| Florence, CO | 3,913 | 31% | 35.8% |
| Huxley, IA | 3,912 | 83% | 71.9% |
| Dupo, IL | 3,917 | 28% | 42.4% |
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