| Index | Mountlake Terrace | Washington | National |
| Average Test Scores | 66% | 54% | 48% |
| Student/Teacher ratio | n/a | 20:1 | 16:1 |
| Total public schools | n/a | 1,991 | 79,221 |
| Total private schools | 1 | 548 | 24,874 |
| Total post-secondary schools | n/a | 147 | 7,963 |
| Index | Mountlake Terrace | Washington | National |
| Completed 8th grade | 90.1% | 87.5% | 84.3% |
| Completed high school | 89.1% | 86.6% | 83.0% |
| Completed some college | 69.9% | 67.7% | 59.4% |
| Completed associate degree | 43.0% | 43.3% | 38.5% |
| Completed bachelors | 31.9% | 33.6% | 30.3% |
| Completed masters | 9.5% | 12.3% | 11.5% |
| Completed professional degree | 2.6% | 3.6% | 3.3% |
| Completed doctorate | 1.2% | 1.5% | 1.3% |
There are a total of n/a public schools, 1 private schools and n/a post-secondary schools in Mountlake Terrace. Using the proficiency score averages, the average test scores for Mountlake Terrace, WA schools is 66%. The average student to teacher ratio is n/a. In Mountlake Terrace, WA, an average of 90.1% of students have completed 8th grade and an average of 89.1% 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% |
| Redmond, WA | 67,959 | 83% | 73.1% |
| Bainbridge Island, WA | 24,859 | 81% | 67.9% |
| Woodinville, WA | 13,038 | 78% | 62.8% |
| Mountlake Terrace, WA | 21,328 | 66% | 36.7% |
| City | Population | Avg. Test Scores | National Avg. |
| La Porte, IN | 21,328 | 49% | 2.7% |
| Cartersville, GA | 21,331 | 45% | 6.1% |
| Selden, NY | 21,338 | 48% | 0.8% |
| Oxford, AL | 21,282 | 52% | 7.3% |
| Birmingham, MI | 21,272 | 70% | 45.8% |
| Mountlake Terrace, WA | 21,328 | 66% | 36.7% |
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