| Index | Harlan | Indiana | National |
| Average Test Scores | n/a | 46% | 48% |
| Student/Teacher ratio | n/a | 22:1 | 16:1 |
| Total public schools | n/a | 1,755 | 79,221 |
| Total private schools | n/a | 675 | 24,874 |
| Total post-secondary schools | n/a | 141 | 7,963 |
| Index | Harlan | Indiana | National |
| Completed 8th grade | 67.0% | 84.6% | 84.3% |
| Completed high school | 66.2% | 82.9% | 83.0% |
| Completed some college | 40.6% | 53.8% | 59.4% |
| Completed associate degree | 25.3% | 33.0% | 38.5% |
| Completed bachelors | 14.9% | 24.6% | 30.3% |
| Completed masters | 2.1% | 8.9% | 11.5% |
| Completed professional degree | 0.0% | 2.4% | 3.3% |
| Completed doctorate | 0.0% | 1.0% | 1.3% |
There are a total of n/a public schools, n/a private schools and n/a post-secondary schools in Harlan. Using the proficiency score averages, the average test scores for Harlan, IN schools is n/a. The average student to teacher ratio is n/a. In Harlan, IN, an average of 67.0% of students have completed 8th grade and an average of 66.2% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Hicksville, OH | 3,189 | 86% | 78.1% |
| Antwerp, OH | 1,550 | 76% | 59.0% |
| Payne, OH | 1,437 | 72% | 50.0% |
| Leo-Cedarville, IN | 3,927 | 68% | 40.6% |
| Woodburn, IN | 1,435 | 56% | 16.1% |
| Harlan, IN | 1,758 | n/a |
| City | Population | Avg. Test Scores | National Avg. |
| West Unity, OH | 1,758 | 66% | 37.0% |
| Shirley, MA | 1,758 | 49% | 1.6% |
| Hamilton, IN | 1,759 | 26% | 46.4% |
| Youngsville, PA | 1,760 | 51% | 6.8% |
| Hatch, NM | 1,756 | 24% | 50.7% |
| Harlan, IN | 1,758 | n/a |
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