| Index | Duck Key | Florida | National |
| Average Test Scores | n/a | 55% | 48% |
| Student/Teacher ratio | n/a | 17:1 | 16:1 |
| Total public schools | n/a | 3,388 | 79,221 |
| Total private schools | n/a | 1,640 | 24,874 |
| Total post-secondary schools | n/a | 466 | 7,963 |
| Index | Duck Key | Florida | National |
| Completed 8th grade | 89.6% | 84.0% | 84.3% |
| Completed high school | 89.0% | 83.0% | 83.0% |
| Completed some college | 74.4% | 58.0% | 59.4% |
| Completed associate degree | 50.3% | 37.4% | 38.5% |
| Completed bachelors | 37.5% | 27.9% | 30.3% |
| Completed masters | 16.5% | 10.0% | 11.5% |
| Completed professional degree | 6.4% | 3.1% | 3.3% |
| Completed doctorate | 3.0% | 1.1% | 1.3% |
There are a total of n/a public schools, n/a private schools and n/a post-secondary schools in Duck Key. Using the proficiency score averages, the average test scores for Duck Key, FL schools is n/a. The average student to teacher ratio is n/a. In Duck Key, FL, an average of 89.6% of students have completed 8th grade and an average of 89.0% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Marathon, FL | 8,746 | 60% | 24.0% |
| Duck Key, FL | 761 | n/a |
| City | Population | Avg. Test Scores | National Avg. |
| Prattsburgh, NY | 761 | 47% | 2.1% |
| Independence, CA | 761 | 45% | 6.3% |
| Jamestown, PA | 761 | 56% | 16.1% |
| Wonewoc, WI | 761 | 36% | 24.3% |
| Ventura, IA | 761 | 74% | 54.2% |
| Duck Key, FL | 761 | n/a |
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