| Index | Hartley | Iowa | National |
| Average Test Scores | 69% | 69% | 48% |
| Student/Teacher ratio | 11:1 | 13:1 | 16:1 |
| Total public schools | 2 | 1,101 | 79,221 |
| Total private schools | n/a | 208 | 24,874 |
| Total post-secondary schools | n/a | 96 | 7,963 |
| Index | Hartley | Iowa | National |
| Completed 8th grade | 88.0% | 89.2% | 84.3% |
| Completed high school | 84.7% | 87.7% | 83.0% |
| Completed some college | 51.7% | 59.8% | 59.4% |
| Completed associate degree | 24.7% | 38.4% | 38.5% |
| Completed bachelors | 11.5% | 27.2% | 30.3% |
| Completed masters | 1.7% | 8.7% | 11.5% |
| Completed professional degree | 0.6% | 2.7% | 3.3% |
| Completed doctorate | 0.4% | 1.1% | 1.3% |
There are a total of 2 public schools, n/a private schools and n/a post-secondary schools in Hartley. Using the proficiency score averages, the average test scores for Hartley, IA schools is 69%. The average student to teacher ratio is 11:1. In Hartley, IA, an average of 88.0% of students have completed 8th grade and an average of 84.7% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Paullina, IA | 934 | 75% | 55.2% |
| Sanborn, IA | 1,359 | 75% | 55.2% |
| Everly, IA | 595 | 70% | 45.8% |
| Primghar, IA | 1,030 | 70% | 44.8% |
| Royal, IA | 505 | 65% | 35.4% |
| Hartley, IA | 1,583 | 69% | 42.7% |
| City | Population | Avg. Test Scores | National Avg. |
| Resaca, GA | 1,583 | 43% | 10.4% |
| Deadwood, SD | 1,584 | 40% | 17.7% |
| Homer City, PA | 1,582 | 57% | 19.3% |
| Metlakatla, AK | 1,582 | 34% | 29.5% |
| Salisbury, MO | 1,584 | 37% | 22.9% |
| Hartley, IA | 1,583 | 69% | 42.7% |
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