| Index | Lengby | Minnesota | National |
| Average Test Scores | n/a | 52% | 48% |
| Student/Teacher ratio | n/a | 16:1 | 16:1 |
| Total public schools | n/a | 2,224 | 79,221 |
| Total private schools | n/a | 477 | 24,874 |
| Total post-secondary schools | n/a | 140 | 7,963 |
| Index | Lengby | Minnesota | National |
| Completed 8th grade | 78.4% | 90.5% | 84.3% |
| Completed high school | 72.5% | 89.5% | 83.0% |
| Completed some college | 29.4% | 66.9% | 59.4% |
| Completed associate degree | 11.8% | 45.2% | 38.5% |
| Completed bachelors | 7.8% | 34.2% | 30.3% |
| Completed masters | 0.0% | 11.5% | 11.5% |
| Completed professional degree | 0.0% | 3.5% | 3.3% |
| Completed doctorate | 0.0% | 1.4% | 1.3% |
There are a total of n/a public schools, n/a private schools and n/a post-secondary schools in Lengby. Using the proficiency score averages, the average test scores for Lengby, MN schools is n/a. The average student to teacher ratio is n/a. In Lengby, MN, an average of 78.4% of students have completed 8th grade and an average of 72.5% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Fosston, MN | 1,451 | 63% | 31.8% |
| Clearbrook, MN | 636 | 50% | 3.1% |
| Bagley, MN | 1,308 | 48% | 1.0% |
| Lengby, MN | 52 | n/a |
| City | Population | Avg. Test Scores | National Avg. |
| Everton, AR | 52 | 37% | 22.9% |
| Lancaster, VA | 52 | 77% | 60.4% |
| Koyukuk, AK | 52 | 50% | 4.2% |
| Kansas, OH | 52 | 66% | 37.8% |
| Takotna, AK | 53 | 50% | 4.2% |
| Lengby, MN | 52 | n/a |
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