| Index | Greendale | Wisconsin | National |
| Average Test Scores | 58% | 41% | 48% |
| Student/Teacher ratio | 20:1 | 14:1 | 16:1 |
| Total public schools | 6 | 1,869 | 79,221 |
| Total private schools | 3 | 872 | 24,874 |
| Total post-secondary schools | n/a | 114 | 7,963 |
| Index | Greendale | Wisconsin | National |
| Completed 8th grade | 94.4% | 89.0% | 84.3% |
| Completed high school | 94.3% | 87.8% | 83.0% |
| Completed some college | 71.4% | 59.7% | 59.4% |
| Completed associate degree | 50.3% | 38.7% | 38.5% |
| Completed bachelors | 40.6% | 28.4% | 30.3% |
| Completed masters | 14.9% | 9.6% | 11.5% |
| Completed professional degree | 3.7% | 2.7% | 3.3% |
| Completed doctorate | 1.6% | 1.1% | 1.3% |
There are a total of 6 public schools, 3 private schools and n/a post-secondary schools in Greendale. Using the proficiency score averages, the average test scores for Greendale, WI schools is 58%. The average student to teacher ratio is 20:1. In Greendale, WI, an average of 94.4% of students have completed 8th grade and an average of 94.3% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Lannon, WI | 1,184 | 75% | 55.2% |
| Elm Grove, WI | 6,156 | 69% | 44.3% |
| Whitefish Bay, WI | 13,890 | 67% | 38.8% |
| Muskego, WI | 25,077 | 66% | 38.1% |
| Sussex, WI | 10,884 | 66% | 37.7% |
| Greendale, WI | 14,160 | 58% | 21.7% |
| City | Population | Avg. Test Scores | National Avg. |
| Williamstown, NJ | 14,161 | 55% | 13.9% |
| 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% |
| Greendale, WI | 14,160 | 58% | 21.7% |
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