| Index | Harlem | Montana | National |
| Average Test Scores | 32% | 45% | 48% |
| Student/Teacher ratio | n/a | 14:1 | 16:1 |
| Total public schools | n/a | 408 | 79,221 |
| Total private schools | n/a | 77 | 24,874 |
| Total post-secondary schools | n/a | 32 | 7,963 |
| Index | Harlem | Montana | National |
| Completed 8th grade | 93.0% | 89.4% | 84.3% |
| Completed high school | 93.0% | 88.2% | 83.0% |
| Completed some college | 76.7% | 63.1% | 59.4% |
| Completed associate degree | 38.4% | 38.6% | 38.5% |
| Completed bachelors | 31.2% | 29.9% | 30.3% |
| Completed masters | 7.6% | 9.8% | 11.5% |
| Completed professional degree | 1.9% | 3.0% | 3.3% |
| Completed doctorate | 1.4% | 1.2% | 1.3% |
There are a total of n/a public schools, n/a private schools and n/a post-secondary schools in Harlem. Using the proficiency score averages, the average test scores for Harlem, MT schools is 32%. The average student to teacher ratio is n/a. In Harlem, MT, an average of 93.0% of students have completed 8th grade and an average of 93.0% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Harlem, MT | 866 | 32% | 32.8% |
| City | Population | Avg. Test Scores | National Avg. |
| Church Hill, MD | 866 | 57% | 18.8% |
| Frenchburg, KY | 866 | 34% | 29.2% |
| Odebolt, IA | 866 | 75% | 56.8% |
| Francesville, IN | 866 | 41% | 14.2% |
| Hesperia, MI | 865 | 28% | 42.0% |
| Harlem, MT | 866 | 32% | 32.8% |
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