| Index | Mercer | Wisconsin | National |
| Average Test Scores | 40% | 41% | 48% |
| Student/Teacher ratio | n/a | 14:1 | 16:1 |
| Total public schools | n/a | 1,869 | 79,221 |
| Total private schools | n/a | 872 | 24,874 |
| Total post-secondary schools | n/a | 114 | 7,963 |
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| Index | Mercer | Wisconsin | National |
| Completed 8th grade | 95.7% | 89.0% | 84.3% |
| Completed high school | 95.7% | 87.8% | 83.0% |
| Completed some college | 63.0% | 59.7% | 59.4% |
| Completed associate degree | 28.6% | 38.7% | 38.5% |
| Completed bachelors | 14.5% | 28.4% | 30.3% |
| Completed masters | 6.5% | 9.6% | 11.5% |
| Completed professional degree | 1.3% | 2.7% | 3.3% |
| Completed doctorate | 0.0% | 1.1% | 1.3% |
There are a total of n/a public schools, n/a private schools and n/a post-secondary schools in Mercer. Using the proficiency score averages, the average test scores for Mercer, WI schools is 40%. The average student to teacher ratio is n/a. In Mercer, WI, an average of 95.7% of students have completed 8th grade and an average of 95.7% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Lac du Flambeau, WI | 1,737 | 18% | 63.5% |
| Mercer, WI | 507 | 40% | 17.7% |
| City | Population | Avg. Test Scores | National Avg. |
| Canute, OK | 507 | 40% | 17.2% |
| Brooks, GA | 507 | 51% | 6.3% |
| Irwinton, GA | 507 | 30% | 37.5% |
| Wyndmere, ND | 507 | 63% | 31.8% |
| Lake, MS | 507 | 39% | 19.1% |
| Mercer, WI | 507 | 40% | 17.7% |
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