| Index | Cottage Lake | Washington | National |
| Average Test Scores | n/a | 54% | 48% |
| Student/Teacher ratio | n/a | 20:1 | 16:1 |
| Total public schools | n/a | 1,991 | 79,221 |
| Total private schools | n/a | 548 | 24,874 |
| Total post-secondary schools | n/a | 147 | 7,963 |
| Index | Cottage Lake | Washington | National |
| Completed 8th grade | 96.2% | 87.5% | 84.3% |
| Completed high school | 96.2% | 86.6% | 83.0% |
| Completed some college | 86.7% | 67.7% | 59.4% |
| Completed associate degree | 69.4% | 43.3% | 38.5% |
| Completed bachelors | 60.8% | 33.6% | 30.3% |
| Completed masters | 24.0% | 12.3% | 11.5% |
| Completed professional degree | 5.9% | 3.6% | 3.3% |
| Completed doctorate | 2.6% | 1.5% | 1.3% |
There are a total of n/a public schools, n/a private schools and n/a post-secondary schools in Cottage Lake. Using the proficiency score averages, the average test scores for Cottage Lake, WA schools is n/a. The average student to teacher ratio is n/a. In Cottage Lake, WA, an average of 96.2% of students have completed 8th grade and an average of 96.2% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Medina, WA | 3,283 | 91% | 88.5% |
| Sammamish, WA | 65,265 | 86% | 78.2% |
| Mercer Island, WA | 25,820 | 85% | 77.8% |
| Redmond, WA | 67,959 | 83% | 73.1% |
| Fall City, WA | 2,357 | 78% | 63.0% |
| Cottage Lake, WA | 23,239 | n/a |
| City | Population | Avg. Test Scores | National Avg. |
| Rock Springs, WY | 23,238 | 51% | 7.2% |
| Roseburg, OR | 23,237 | 42% | 12.2% |
| Avon, OH | 23,233 | 87% | 80.2% |
| Greenbelt, MD | 23,253 | 44% | 9.0% |
| Auburn, ME | 23,267 | 37% | 23.2% |
| Cottage Lake, WA | 23,239 | n/a |
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