| Index | Diamond | Illinois | National |
| Average Test Scores | n/a | 33% | 48% |
| Student/Teacher ratio | n/a | 18:1 | 16:1 |
| Total public schools | n/a | 3,938 | 79,221 |
| Total private schools | n/a | 1,438 | 24,874 |
| Total post-secondary schools | n/a | 306 | 7,963 |
| Index | Diamond | Illinois | National |
| Completed 8th grade | 81.5% | 86.2% | 84.3% |
| Completed high school | 79.9% | 84.7% | 83.0% |
| Completed some college | 47.8% | 61.8% | 59.4% |
| Completed associate degree | 21.6% | 40.7% | 38.5% |
| Completed bachelors | 11.0% | 32.9% | 30.3% |
| Completed masters | 5.2% | 12.7% | 11.5% |
| Completed professional degree | 0.0% | 3.4% | 3.3% |
| Completed doctorate | 0.0% | 1.2% | 1.3% |
There are a total of n/a public schools, n/a private schools and n/a post-secondary schools in Diamond. Using the proficiency score averages, the average test scores for Diamond, IL schools is n/a. The average student to teacher ratio is n/a. In Diamond, IL, an average of 81.5% of students have completed 8th grade and an average of 79.9% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Manhattan, IL | 8,218 | 54% | 12.5% |
| Elwood, IL | 2,524 | 51% | 5.2% |
| Coal City, IL | 4,941 | 49% | 1.3% |
| Channahon, IL | 13,281 | 48% | 0.7% |
| South Wilmington, IL | 702 | 45% | 6.3% |
| Diamond, IL | 2,786 | n/a |
| City | Population | Avg. Test Scores | National Avg. |
| Canadian, TX | 2,786 | 62% | 29.9% |
| Fairview, PA | 2,786 | 77% | 60.2% |
| Grand Forks AFB, ND | 2,785 | 63% | 31.8% |
| Angola, NY | 2,787 | 50% | 4.7% |
| Lake Helen, FL | 2,787 | 62% | 29.2% |
| Diamond, IL | 2,786 | n/a |
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