| Index | Williamstown | New Jersey | National |
| Average Test Scores | 55% | 52% | 48% |
| Student/Teacher ratio | 14:1 | 13:1 | 16:1 |
| Total public schools | 7 | 1,604 | 79,221 |
| Total private schools | 2 | 823 | 24,874 |
| Total post-secondary schools | n/a | 157 | 7,963 |
| Index | Williamstown | New Jersey | National |
| Completed 8th grade | 89.3% | 87.5% | 84.3% |
| Completed high school | 87.4% | 86.3% | 83.0% |
| Completed some college | 51.9% | 60.7% | 59.4% |
| Completed associate degree | 31.9% | 43.9% | 38.5% |
| Completed bachelors | 22.6% | 37.5% | 30.3% |
| Completed masters | 6.8% | 14.4% | 11.5% |
| Completed professional degree | 1.2% | 4.0% | 3.3% |
| Completed doctorate | 0.5% | 1.5% | 1.3% |
There are a total of 7 public schools, 2 private schools and n/a post-secondary schools in Williamstown. Using the proficiency score averages, the average test scores for Williamstown, NJ schools is 55%. The average student to teacher ratio is 14:1. In Williamstown, NJ, an average of 89.3% of students have completed 8th grade and an average of 87.4% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Barclay, NJ | 4,044 | 80% | 65.6% |
| Greentree, NJ | 10,597 | 75% | 55.7% |
| Haddonfield, NJ | 11,342 | 70% | 45.7% |
| Voorhees, NJ | 1,686 | 67% | 40.5% |
| Springdale, NJ | 14,111 | 67% | 38.5% |
| Williamstown, NJ | 14,161 | 55% | 13.9% |
| City | Population | Avg. Test Scores | National Avg. |
| Greendale, WI | 14,160 | 58% | 21.7% |
| Anna, TX | 14,159 | 50% | 5.0% |
| Washington Court House, OH | 14,155 | 64% | 33.1% |
| Hockessin, DE | 14,172 | 67% | 39.2% |
| Setauket-East Setauket, NY | 14,174 | 80% | 65.6% |
| Williamstown, NJ | 14,161 | 55% | 13.9% |
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