| Index | Kelso | Washington | National |
| Average Test Scores | 46% | 54% | 48% |
| Student/Teacher ratio | 20:1 | 20:1 | 16:1 |
| Total public schools | 10 | 1,991 | 79,221 |
| Total private schools | 3 | 548 | 24,874 |
| Total post-secondary schools | n/a | 147 | 7,963 |
| Index | Kelso | Washington | National |
| Completed 8th grade | 74.3% | 87.5% | 84.3% |
| Completed high school | 72.8% | 86.6% | 83.0% |
| Completed some college | 45.2% | 67.7% | 59.4% |
| Completed associate degree | 16.3% | 43.3% | 38.5% |
| Completed bachelors | 9.4% | 33.6% | 30.3% |
| Completed masters | 4.4% | 12.3% | 11.5% |
| Completed professional degree | 1.3% | 3.6% | 3.3% |
| Completed doctorate | 0.7% | 1.5% | 1.3% |
There are a total of 10 public schools, 3 private schools and n/a post-secondary schools in Kelso. Using the proficiency score averages, the average test scores for Kelso, WA schools is 46%. The average student to teacher ratio is 20:1. In Kelso, WA, an average of 74.3% of students have completed 8th grade and an average of 72.8% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Kalama, WA | 2,708 | 53% | 10.4% |
| Woodland, WA | 6,223 | 51% | 6.6% |
| Castle Rock, WA | 2,917 | 46% | 5.2% |
| Longview, WA | 37,914 | 43% | 9.6% |
| Rainier, OR | 2,080 | 37% | 23.3% |
| Kelso, WA | 12,237 | 46% | 5.0% |
| City | Population | Avg. Test Scores | National Avg. |
| Palmer Town, MA | 12,236 | 34% | 28.5% |
| Northlake, IL | 12,235 | 24% | 49.8% |
| Orange City, FL | 12,232 | 52% | 8.1% |
| Carnot-Moon, PA | 12,242 | 73% | 51.3% |
| Ringwood, NJ | 12,229 | 69% | 44.0% |
| Kelso, WA | 12,237 | 46% | 5.0% |
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