| Index | Sussex | Wisconsin | National |
| Average Test Scores | 66% | 41% | 48% |
| Student/Teacher ratio | 15:1 | 14:1 | 16:1 |
| Total public schools | 5 | 1,869 | 79,221 |
| Total private schools | 1 | 872 | 24,874 |
| Total post-secondary schools | n/a | 114 | 7,963 |
| Index | Sussex | Wisconsin | National |
| Completed 8th grade | 95.0% | 89.0% | 84.3% |
| Completed high school | 94.4% | 87.8% | 83.0% |
| Completed some college | 71.1% | 59.7% | 59.4% |
| Completed associate degree | 52.1% | 38.7% | 38.5% |
| Completed bachelors | 40.4% | 28.4% | 30.3% |
| Completed masters | 10.9% | 9.6% | 11.5% |
| Completed professional degree | 1.8% | 2.7% | 3.3% |
| Completed doctorate | 0.5% | 1.1% | 1.3% |
There are a total of 5 public schools, 1 private schools and n/a post-secondary schools in Sussex. Using the proficiency score averages, the average test scores for Sussex, WI schools is 66%. The average student to teacher ratio is 15:1. In Sussex, WI, an average of 95.0% of students have completed 8th grade and an average of 94.4% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Lannon, WI | 1,184 | 75% | 55.2% |
| North Prairie, WI | 2,542 | 72% | 49.0% |
| Merton, WI | 3,721 | 72% | 49.0% |
| Elm Grove, WI | 6,156 | 69% | 44.3% |
| Hartland, WI | 9,317 | 69% | 44.0% |
| Sussex, WI | 10,884 | 66% | 37.7% |
| City | Population | Avg. Test Scores | National Avg. |
| Kings Mountain, NC | 10,885 | 48% | 0.4% |
| River Forest, IL | 10,883 | 67% | 38.5% |
| Malvern, AR | 10,886 | 40% | 17.4% |
| Camden, AR | 10,877 | 36% | 26.0% |
| Manchester, TN | 10,896 | 38% | 21.9% |
| Sussex, WI | 10,884 | 66% | 37.7% |
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