| 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 |


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| 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 | 4,566 | 75% | 55.2% |
| Lannon, WI | 1,221 | 75% | 55.2% |
| Cedarburg, WI | 11,850 | 68% | 40.8% |
| Whitefish Bay, WI | 14,209 | 67% | 38.8% |
| Mequon, WI | 25,189 | 67% | 38.7% |
| Grafton, WI | 12,131 | 61% | 27.6% |
| City | Population | Avg. Test Scores | National Avg. |
| Crossville, TN | 12,131 | 40% | 17.6% |
| Emeryville, CA | 12,131 | 32% | 32.8% |
| Bucyrus, OH | 12,135 | 59% | 21.9% |
| Webb City, MO | 12,139 | 65% | 35.2% |
| Salem, OH | 12,141 | 68% | 41.9% |
| Grafton, WI | 12,131 | 61% | 27.6% |