| Index | Merrill | Iowa | National |
| Average Test Scores | n/a | 69% | 48% |
| Student/Teacher ratio | n/a | 13:1 | 16:1 |
| Total public schools | n/a | 1,101 | 79,221 |
| Total private schools | n/a | 208 | 24,874 |
| Total post-secondary schools | n/a | 96 | 7,963 |

| Index | Merrill | Iowa | National |
| Completed 8th grade | 85.4% | 89.2% | 84.3% |
| Completed high school | 84.7% | 87.7% | 83.0% |
| Completed some college | 52.1% | 59.8% | 59.4% |
| Completed associate degree | 25.9% | 38.4% | 38.5% |
| Completed bachelors | 13.7% | 27.2% | 30.3% |
| Completed masters | 1.7% | 8.7% | 11.5% |
| Completed professional degree | 0.0% | 2.7% | 3.3% |
| Completed doctorate | 0.0% | 1.1% | 1.3% |
There are a total of n/a public schools, n/a private schools and n/a post-secondary schools in Merrill. Using the proficiency score averages, the average test scores for Merrill, IA schools is n/a. The average student to teacher ratio is n/a. In Merrill, IA, an average of 85.4% of students have completed 8th grade and an average of 84.7% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Hinton, IA | 837 | 78% | 62.5% |
| Kingsley, IA | 1,495 | 76% | 58.3% |
| Le Mars, IA | 10,368 | 72% | 49.0% |
| Remsen, IA | 1,840 | 71% | 47.9% |
| North Sioux City, SD | 2,944 | 60% | 25.5% |
| Merrill, IA | 1,056 | n/a |
| City | Population | Avg. Test Scores | National Avg. |
| New Franklin, MO | 1,056 | 47% | 2.1% |
| Shipshewana, IN | 1,057 | 61% | 26.6% |
| Primghar, IA | 1,057 | 70% | 44.8% |
| Maud, OK | 1,055 | 32% | 32.8% |
| Von Ormy, TX | 1,055 | 34% | 29.4% |
| Merrill, IA | 1,056 | n/a |