| Index | Colby | Wisconsin | National |
| Average Test Scores | 30% | 41% | 48% |
| Student/Teacher ratio | 15:1 | 14:1 | 16:1 |
| Total public schools | 3 | 1,869 | 79,221 |
| Total private schools | 1 | 872 | 24,874 |
| Total post-secondary schools | n/a | 114 | 7,963 |
| Index | Colby | Wisconsin | National |
| Completed 8th grade | 80.5% | 89.0% | 84.3% |
| Completed high school | 75.5% | 87.8% | 83.0% |
| Completed some college | 35.5% | 59.7% | 59.4% |
| Completed associate degree | 14.1% | 38.7% | 38.5% |
| Completed bachelors | 9.0% | 28.4% | 30.3% |
| Completed masters | 3.0% | 9.6% | 11.5% |
| Completed professional degree | 1.9% | 2.7% | 3.3% |
| Completed doctorate | 0.2% | 1.1% | 1.3% |
There are a total of 3 public schools, 1 private schools and n/a post-secondary schools in Colby. Using the proficiency score averages, the average test scores for Colby, WI schools is 30%. The average student to teacher ratio is 15:1. In Colby, WI, an average of 80.5% of students have completed 8th grade and an average of 75.5% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Stetsonville, WI | 711 | 55% | 13.5% |
| Greenwood, WI | 955 | 48% | 0.5% |
| Stratford, WI | 1,454 | 48% | 0.3% |
| Spencer, WI | 1,690 | 48% | 0.5% |
| Athens, WI | 952 | 35% | 27.6% |
| Colby, WI | 2,539 | 30% | 37.2% |
| City | Population | Avg. Test Scores | National Avg. |
| Galva, IL | 2,539 | 30% | 38.5% |
| Sisseton, SD | 2,539 | 35% | 28.1% |
| McLeansboro, IL | 2,539 | 39% | 19.3% |
| Madelia, MN | 2,539 | 53% | 10.9% |
| Clinton, AR | 2,538 | 56% | 16.7% |
| Colby, WI | 2,539 | 30% | 37.2% |
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