| Index | Lewis | Iowa | National |
| Average Test Scores | 75% | 69% | 48% |
| Student/Teacher ratio | n/a | 13:1 | 16:1 |
| Total public schools | n/a | 1,101 | 79,221 |
| Total private schools | n/a | 208 | 24,874 |
| Total post-secondary schools | n/a | 96 | 7,963 |
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| Index | Lewis | Iowa | National |
| Completed 8th grade | 78.5% | 89.2% | 84.3% |
| Completed high school | 75.9% | 87.7% | 83.0% |
| Completed some college | 36.1% | 59.8% | 59.4% |
| Completed associate degree | 11.7% | 38.4% | 38.5% |
| Completed bachelors | 5.6% | 27.2% | 30.3% |
| Completed masters | 0.0% | 8.7% | 11.5% |
| Completed professional degree | 0.0% | 2.7% | 3.3% |
| Completed doctorate | 0.0% | 1.1% | 1.3% |
There are a total of n/a public schools, n/a private schools and n/a post-secondary schools in Lewis. Using the proficiency score averages, the average test scores for Lewis, IA schools is 75%. The average student to teacher ratio is n/a. In Lewis, IA, an average of 78.5% of students have completed 8th grade and an average of 75.9% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Elliott, IA | 539 | 85% | 77.1% |
| Avoca, IA | 1,368 | 77% | 61.1% |
| Griswold, IA | 1,179 | 75% | 55.2% |
| Atlantic, IA | 6,600 | 69% | 43.0% |
| Lewis, IA | 513 | 75% | 56.3% |
| City | Population | Avg. Test Scores | National Avg. |
| Walden, CO | 513 | 25% | 49.0% |
| Selby, SD | 513 | 52% | 7.6% |
| Delta, PA | 513 | 47% | 2.1% |
| Beaver, OH | 513 | 55% | 13.9% |
| Brushton, NY | 512 | 34% | 28.6% |
| Lewis, IA | 513 | 75% | 56.3% |
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