| Index | Lewiston | California | National |
| Average Test Scores | 35% | 43% | 48% |
| Student/Teacher ratio | 19:1 | 20:1 | 16:1 |
| Total public schools | 1 | 8,308 | 79,221 |
| Total private schools | n/a | 3,438 | 24,874 |
| Total post-secondary schools | n/a | 1,085 | 7,963 |
| Index | Lewiston | California | National |
| Completed 8th grade | 87.0% | 81.1% | 84.3% |
| Completed high school | 87.0% | 79.8% | 83.0% |
| Completed some college | 56.6% | 61.5% | 59.4% |
| Completed associate degree | 24.5% | 39.8% | 38.5% |
| Completed bachelors | 15.7% | 32.0% | 30.3% |
| Completed masters | 3.0% | 11.9% | 11.5% |
| Completed professional degree | 0.5% | 3.9% | 3.3% |
| Completed doctorate | 0.5% | 1.6% | 1.3% |
There are a total of 1 public schools, n/a private schools and n/a post-secondary schools in Lewiston. Using the proficiency score averages, the average test scores for Lewiston, CA schools is 35%. The average student to teacher ratio is 19:1. In Lewiston, CA, an average of 87.0% of students have completed 8th grade and an average of 87.0% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Junction City, CA | 754 | 70% | 45.8% |
| Douglas City, CA | 678 | 70% | 44.8% |
| French Gulch, CA | 441 | 50% | 4.2% |
| Weaverville, CA | 3,308 | 49% | 1.4% |
| Lewiston, CA | 1,481 | 35% | 27.1% |
| City | Population | Avg. Test Scores | National Avg. |
| Tarkio, MO | 1,481 | 45% | 7.3% |
| St. David, AZ | 1,481 | 46% | 4.9% |
| Greenfield, IL | 1,481 | 36% | 25.0% |
| Pleasant Valley, NY | 1,481 | 43% | 11.5% |
| Beattyville, KY | 1,481 | 45% | 5.7% |
| Lewiston, CA | 1,481 | 35% | 27.1% |
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