| Index | Lake Mills | Wisconsin | National |
| Average Test Scores | 48% | 41% | 48% |
| Student/Teacher ratio | 15:1 | 14:1 | 16:1 |
| Total public schools | 3 | 1,869 | 79,221 |
| Total private schools | 2 | 872 | 24,874 |
| Total post-secondary schools | n/a | 114 | 7,963 |


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| Index | Lake Mills | Wisconsin | National |
| Completed 8th grade | 88.7% | 89.0% | 84.3% |
| Completed high school | 87.4% | 87.8% | 83.0% |
| Completed some college | 67.1% | 59.7% | 59.4% |
| Completed associate degree | 46.3% | 38.7% | 38.5% |
| Completed bachelors | 35.6% | 28.4% | 30.3% |
| Completed masters | 8.0% | 9.6% | 11.5% |
| Completed professional degree | 1.3% | 2.7% | 3.3% |
| Completed doctorate | 0.4% | 1.1% | 1.3% |
There are a total of 3 public schools, 2 private schools and n/a post-secondary schools in Lake Mills. Using the proficiency score averages, the average test scores for Lake Mills, WI schools is 48%. The average student to teacher ratio is 15:1. In Lake Mills, WI, an average of 88.7% of students have completed 8th grade and an average of 87.4% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Cottage Grove, WI | 7,270 | 53% | 9.4% |
| Cambridge, WI | 1,307 | 50% | 3.6% |
| Deerfield, WI | 2,648 | 45% | 5.9% |
| Fort Atkinson, WI | 12,734 | 45% | 6.1% |
| Watertown, WI | 24,039 | 44% | 9.2% |
| Lake Mills, WI | 6,132 | 48% | 0.7% |
| City | Population | Avg. Test Scores | National Avg. |
| Lake Alfred, FL | 6,132 | 44% | 8.5% |
| Pea Ridge, AR | 6,131 | 46% | 3.5% |
| Taylor, PA | 6,135 | 50% | 4.2% |
| Portland, CT | 6,128 | 61% | 26.3% |
| Countryside, IL | 6,127 | 30% | 38.5% |
| Lake Mills, WI | 6,132 | 48% | 0.7% |