| Index | Plainfield | Illinois | National |
| Average Test Scores | 44% | 33% | 48% |
| Student/Teacher ratio | 23:1 | 18:1 | 16:1 |
| Total public schools | 19 | 3,938 | 79,221 |
| Total private schools | 5 | 1,438 | 24,874 |
| Total post-secondary schools | n/a | 306 | 7,963 |
| Index | Plainfield | Illinois | National |
| Completed 8th grade | 95.9% | 86.2% | 84.3% |
| Completed high school | 95.4% | 84.7% | 83.0% |
| Completed some college | 79.4% | 61.8% | 59.4% |
| Completed associate degree | 60.6% | 40.7% | 38.5% |
| Completed bachelors | 50.9% | 32.9% | 30.3% |
| Completed masters | 19.1% | 12.7% | 11.5% |
| Completed professional degree | 3.3% | 3.4% | 3.3% |
| Completed doctorate | 1.9% | 1.2% | 1.3% |
There are a total of 19 public schools, 5 private schools and n/a post-secondary schools in Plainfield. Using the proficiency score averages, the average test scores for Plainfield, IL schools is 44%. The average student to teacher ratio is 23:1. In Plainfield, IL, an average of 95.9% of students have completed 8th grade and an average of 95.4% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Clarendon Hills, IL | 8,834 | 77% | 59.4% |
| Naperville, IL | 147,734 | 65% | 35.1% |
| Lisle, IL | 23,363 | 56% | 16.7% |
| Big Rock, IL | 1,271 | 55% | 13.5% |
| Manhattan, IL | 8,218 | 54% | 12.5% |
| Plainfield, IL | 44,857 | 44% | 9.3% |
| City | Population | Avg. Test Scores | National Avg. |
| Winter Garden, FL | 44,888 | 64% | 32.5% |
| Binghamton, NY | 44,819 | 43% | 10.5% |
| Morgan Hill, CA | 44,789 | 46% | 5.2% |
| Danville, CA | 44,933 | 75% | 56.1% |
| Oakland Park, FL | 44,950 | 41% | 15.5% |
| Plainfield, IL | 44,857 | 44% | 9.3% |
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