| Index | Arlington | Washington | National |
| Average Test Scores | 54% | 54% | 48% |
| Student/Teacher ratio | 26:1 | 20:1 | 16:1 |
| Total public schools | 10 | 1,991 | 79,221 |
| Total private schools | 2 | 548 | 24,874 |
| Total post-secondary schools | n/a | 147 | 7,963 |
| Index | Arlington | Washington | National |
| Completed 8th grade | 85.4% | 87.5% | 84.3% |
| Completed high school | 85.3% | 86.6% | 83.0% |
| Completed some college | 60.8% | 67.7% | 59.4% |
| Completed associate degree | 28.7% | 43.3% | 38.5% |
| Completed bachelors | 17.4% | 33.6% | 30.3% |
| Completed masters | 5.3% | 12.3% | 11.5% |
| Completed professional degree | 1.0% | 3.6% | 3.3% |
| Completed doctorate | 0.2% | 1.5% | 1.3% |
There are a total of 10 public schools, 2 private schools and n/a post-secondary schools in Arlington. Using the proficiency score averages, the average test scores for Arlington, WA schools is 54%. The average student to teacher ratio is 26:1. In Arlington, WA, an average of 85.4% of students have completed 8th grade and an average of 85.3% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Lake Stevens, WA | 33,470 | 64% | 32.6% |
| Stanwood, WA | 7,228 | 59% | 23.4% |
| Langley, WA | 1,201 | 56% | 17.2% |
| Marysville, WA | 69,629 | 45% | 6.7% |
| Granite Falls, WA | 3,961 | 36% | 24.7% |
| Arlington, WA | 19,947 | 54% | 11.7% |
| City | Population | Avg. Test Scores | National Avg. |
| Rio Rico, AZ | 19,948 | 32% | 33.9% |
| Havelock, NC | 19,927 | 49% | 2.9% |
| Snellville, GA | 19,923 | 49% | 1.4% |
| Fort Mill, SC | 19,920 | 72% | 49.1% |
| Ennis, TX | 19,917 | 44% | 7.7% |
| Arlington, WA | 19,947 | 54% | 11.7% |
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