| Index | Northfield | Illinois | National |
| Average Test Scores | 74% | 33% | 48% |
| Student/Teacher ratio | 12:1 | 18:1 | 16:1 |
| Total public schools | 3 | 3,938 | 79,221 |
| Total private schools | 2 | 1,438 | 24,874 |
| Total post-secondary schools | n/a | 306 | 7,963 |
| Index | Northfield | Illinois | National |
| Completed 8th grade | 98.5% | 86.2% | 84.3% |
| Completed high school | 98.5% | 84.7% | 83.0% |
| Completed some college | 91.7% | 61.8% | 59.4% |
| Completed associate degree | 79.2% | 40.7% | 38.5% |
| Completed bachelors | 76.5% | 32.9% | 30.3% |
| Completed masters | 37.8% | 12.7% | 11.5% |
| Completed professional degree | 14.8% | 3.4% | 3.3% |
| Completed doctorate | 2.7% | 1.2% | 1.3% |
There are a total of 3 public schools, 2 private schools and n/a post-secondary schools in Northfield. Using the proficiency score averages, the average test scores for Northfield, IL schools is 74%. The average student to teacher ratio is 12:1. In Northfield, IL, an average of 98.5% of students have completed 8th grade and an average of 98.5% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Lincolnshire, IL | 7,694 | 78% | 62.8% |
| Bannockburn, IL | 1,194 | 77% | 60.4% |
| Deerfield, IL | 19,030 | 77% | 59.4% |
| Kenilworth, IL | 2,356 | 74% | 53.1% |
| Winnetka, IL | 12,361 | 73% | 52.3% |
| Northfield, IL | 5,678 | 74% | 53.1% |
| City | Population | Avg. Test Scores | National Avg. |
| Trenton, MO | 5,679 | 49% | 2.1% |
| Sharon Hill, PA | 5,680 | 31% | 36.5% |
| Ballston Spa, NY | 5,675 | 65% | 34.4% |
| Hollidaysburg, PA | 5,675 | 64% | 32.8% |
| Mount Carmel, PA | 5,672 | 48% | 0.7% |
| Northfield, IL | 5,678 | 74% | 53.1% |
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