| Index | Greenfield | Wisconsin | National |
| Average Test Scores | 37% | 41% | 48% |
| Student/Teacher ratio | 16:1 | 14:1 | 16:1 |
| Total public schools | 8 | 1,869 | 79,221 |
| Total private schools | 3 | 872 | 24,874 |
| Total post-secondary schools | 3 | 114 | 7,963 |
| Index | Greenfield | Wisconsin | National |
| Completed 8th grade | 90.0% | 89.0% | 84.3% |
| Completed high school | 88.7% | 87.8% | 83.0% |
| Completed some college | 59.5% | 59.7% | 59.4% |
| Completed associate degree | 36.8% | 38.7% | 38.5% |
| Completed bachelors | 28.9% | 28.4% | 30.3% |
| Completed masters | 8.6% | 9.6% | 11.5% |
| Completed professional degree | 1.9% | 2.7% | 3.3% |
| Completed doctorate | 0.8% | 1.1% | 1.3% |
There are a total of 8 public schools, 3 private schools and 3 post-secondary schools in Greenfield. Using the proficiency score averages, the average test scores for Greenfield, WI schools is 37%. The average student to teacher ratio is 16:1. In Greenfield, WI, an average of 90.0% of students have completed 8th grade and an average of 88.7% 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% |
| Greenfield, WI | 37,117 | 37% | 22.3% |
| City | Population | Avg. Test Scores | National Avg. |
| Cottage Grove, MN | 37,120 | 58% | 21.7% |
| Mechanicsville, VA | 37,141 | 89% | 84.9% |
| Aventura, FL | 37,151 | 89% | 84.4% |
| Oregon City, OR | 37,057 | 49% | 2.4% |
| Braintree Town, MA | 37,196 | 66% | 38.0% |
| Greenfield, WI | 37,117 | 37% | 22.3% |
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