| Index | Marengo | Illinois | National |
| Average Test Scores | 44% | 33% | 48% |
| Student/Teacher ratio | 27:1 | 18:1 | 16:1 |
| Total public schools | 4 | 3,938 | 79,221 |
| Total private schools | 1 | 1,438 | 24,874 |
| Total post-secondary schools | n/a | 306 | 7,963 |
| Index | Marengo | Illinois | National |
| Completed 8th grade | 87.0% | 86.2% | 84.3% |
| Completed high school | 84.5% | 84.7% | 83.0% |
| Completed some college | 53.3% | 61.8% | 59.4% |
| Completed associate degree | 27.0% | 40.7% | 38.5% |
| Completed bachelors | 20.2% | 32.9% | 30.3% |
| Completed masters | 7.3% | 12.7% | 11.5% |
| Completed professional degree | 0.7% | 3.4% | 3.3% |
| Completed doctorate | 0.2% | 1.2% | 1.3% |
There are a total of 4 public schools, 1 private schools and n/a post-secondary schools in Marengo. Using the proficiency score averages, the average test scores for Marengo, IL schools is 44%. The average student to teacher ratio is 27:1. In Marengo, IL, an average of 87.0% of students have completed 8th grade and an average of 84.5% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Burlington, IL | 514 | 54% | 12.5% |
| Huntley, IL | 27,413 | 50% | 3.6% |
| Sleepy Hollow, IL | 3,276 | 50% | 3.1% |
| Algonquin, IL | 30,848 | 48% | 0.9% |
| Crystal Lake, IL | 39,685 | 46% | 3.9% |
| Marengo, IL | 7,871 | 44% | 8.5% |
| City | Population | Avg. Test Scores | National Avg. |
| Lake Geneva, WI | 7,872 | 51% | 6.5% |
| Woodlawn CDP (Prince George's County), MD | 7,873 | 16% | 67.7% |
| Lampasas, TX | 7,869 | 49% | 1.8% |
| Santa Clara, UT | 7,868 | 47% | 1.7% |
| Dexter, MO | 7,867 | 45% | 5.9% |
| Marengo, IL | 7,871 | 44% | 8.5% |
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