| Index | Grafton | Wisconsin | National |
| Average Test Scores | 61% | 41% | 48% |
| Student/Teacher ratio | 14:1 | 14:1 | 16:1 |
| Total public schools | 5 | 1,869 | 79,221 |
| Total private schools | 2 | 872 | 24,874 |
| Total post-secondary schools | 1 | 114 | 7,963 |
| Index | Grafton | Wisconsin | National |
| Completed 8th grade | 94.7% | 89.0% | 84.3% |
| Completed high school | 94.1% | 87.8% | 83.0% |
| Completed some college | 72.6% | 59.7% | 59.4% |
| Completed associate degree | 49.6% | 38.7% | 38.5% |
| Completed bachelors | 40.4% | 28.4% | 30.3% |
| Completed masters | 11.6% | 9.6% | 11.5% |
| Completed professional degree | 2.4% | 2.7% | 3.3% |
| Completed doctorate | 1.3% | 1.1% | 1.3% |
There are a total of 5 public schools, 2 private schools and 1 post-secondary schools in Grafton. Using the proficiency score averages, the average test scores for Grafton, WI schools is 61%. The average student to teacher ratio is 14:1. In Grafton, WI, an average of 94.7% of students have completed 8th grade and an average of 94.1% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Saukville, WI | 4,448 | 75% | 55.2% |
| Lannon, WI | 1,184 | 75% | 55.2% |
| Cedarburg, WI | 11,592 | 68% | 40.8% |
| Whitefish Bay, WI | 13,890 | 67% | 38.8% |
| Mequon, WI | 24,357 | 67% | 38.7% |
| Grafton, WI | 11,718 | 61% | 27.6% |
| City | Population | Avg. Test Scores | National Avg. |
| Wanaque, NJ | 11,719 | 62% | 28.5% |
| Webster, MA | 11,719 | 29% | 39.6% |
| Florham Park, NJ | 11,719 | 74% | 53.6% |
| Arlington, TN | 11,715 | 47% | 2.8% |
| Portales, NM | 11,713 | 30% | 38.0% |
| Grafton, WI | 11,718 | 61% | 27.6% |
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