| Index | Waterloo | Illinois | National |
| Average Test Scores | 59% | 33% | 48% |
| Student/Teacher ratio | 34:1 | 18:1 | 16:1 |
| Total public schools | 4 | 3,938 | 79,221 |
| Total private schools | 2 | 1,438 | 24,874 |
| Total post-secondary schools | n/a | 306 | 7,963 |
| Index | Waterloo | Illinois | National |
| Completed 8th grade | 90.4% | 86.2% | 84.3% |
| Completed high school | 89.6% | 84.7% | 83.0% |
| Completed some college | 64.3% | 61.8% | 59.4% |
| Completed associate degree | 34.1% | 40.7% | 38.5% |
| Completed bachelors | 25.5% | 32.9% | 30.3% |
| Completed masters | 9.4% | 12.7% | 11.5% |
| Completed professional degree | 1.3% | 3.4% | 3.3% |
| Completed doctorate | 0.5% | 1.2% | 1.3% |
There are a total of 4 public schools, 2 private schools and n/a post-secondary schools in Waterloo. Using the proficiency score averages, the average test scores for Waterloo, IL schools is 59%. The average student to teacher ratio is 34:1. In Waterloo, IL, an average of 90.4% of students have completed 8th grade and an average of 89.6% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Smithton, IL | 4,019 | 61% | 27.1% |
| Sappington, MO | 7,161 | 60% | 24.3% |
| Festus, MO | 12,054 | 59% | 23.1% |
| Herculaneum, MO | 4,081 | 56% | 16.7% |
| Columbia, IL | 10,692 | 56% | 16.7% |
| Waterloo, IL | 10,417 | 59% | 22.4% |
| City | Population | Avg. Test Scores | National Avg. |
| Pine Hill, NJ | 10,418 | 37% | 23.4% |
| Oak Hills, CA | 10,415 | 47% | 2.1% |
| Frederick, CO | 10,414 | 35% | 26.7% |
| Portage, WI | 10,412 | 47% | 3.1% |
| Monmouth, OR | 10,411 | 40% | 17.7% |
| Waterloo, IL | 10,417 | 59% | 22.4% |
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