| Index | Northfield | New Jersey | National |
| Average Test Scores | 53% | 52% | 48% |
| Student/Teacher ratio | 15:1 | 13:1 | 16:1 |
| Total public schools | 2 | 1,604 | 79,221 |
| Total private schools | 1 | 823 | 24,874 |
| Total post-secondary schools | n/a | 157 | 7,963 |
| Index | Northfield | New Jersey | National |
| Completed 8th grade | 89.0% | 87.5% | 84.3% |
| Completed high school | 88.6% | 86.3% | 83.0% |
| Completed some college | 60.9% | 60.7% | 59.4% |
| Completed associate degree | 42.4% | 43.9% | 38.5% |
| Completed bachelors | 33.4% | 37.5% | 30.3% |
| Completed masters | 10.4% | 14.4% | 11.5% |
| Completed professional degree | 2.1% | 4.0% | 3.3% |
| Completed doctorate | 0.9% | 1.5% | 1.3% |
There are a total of 2 public schools, 1 private schools and n/a post-secondary schools in Northfield. Using the proficiency score averages, the average test scores for Northfield, NJ schools is 53%. The average student to teacher ratio is 15:1. In Northfield, NJ, an average of 89.0% of students have completed 8th grade and an average of 88.6% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Margate City, NJ | 5,921 | 82% | 70.8% |
| Barclay, NJ | 4,044 | 80% | 65.6% |
| Port Republic, NJ | 1,127 | 70% | 44.8% |
| Linwood, NJ | 6,719 | 67% | 40.3% |
| Ocean City, NJ | 11,065 | 56% | 16.3% |
| Northfield, NJ | 8,088 | 53% | 10.9% |
| City | Population | Avg. Test Scores | National Avg. |
| Garden City Park, NY | 8,087 | 73% | 52.1% |
| Ellsworth, ME | 8,085 | 48% | 1.0% |
| Oak Brook, IL | 8,085 | 79% | 64.6% |
| Bel Aire, KS | 8,082 | 40% | 17.2% |
| Ephrata, WA | 8,081 | 58% | 19.8% |
| Northfield, NJ | 8,088 | 53% | 10.9% |
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