| 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 |
| 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 | 7,086 | 53% | 9.4% |
| Cambridge, WI | 1,260 | 50% | 3.6% |
| Deerfield, WI | 2,553 | 45% | 5.9% |
| Fort Atkinson, WI | 12,455 | 45% | 6.1% |
| Watertown, WI | 23,561 | 44% | 9.2% |
| Lake Mills, WI | 5,936 | 48% | 0.7% |
| City | Population | Avg. Test Scores | National Avg. |
| Hilmar-Irwin, CA | 5,937 | 40% | 16.9% |
| Portland, CT | 5,937 | 61% | 26.3% |
| Taylor, PA | 5,935 | 50% | 4.2% |
| Pevely, MO | 5,937 | 47% | 2.1% |
| Sunbury, OH | 5,934 | 79% | 65.3% |
| Lake Mills, WI | 5,936 | 48% | 0.7% |
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