| Index | Parnell | 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 | Parnell | Iowa | National |
| Completed 8th grade | 93.9% | 89.2% | 84.3% |
| Completed high school | 91.8% | 87.7% | 83.0% |
| Completed some college | 57.1% | 59.8% | 59.4% |
| Completed associate degree | 24.5% | 38.4% | 38.5% |
| Completed bachelors | 6.1% | 27.2% | 30.3% |
| Completed masters | 3.4% | 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 Parnell. Using the proficiency score averages, the average test scores for Parnell, IA schools is n/a. The average student to teacher ratio is n/a. In Parnell, IA, an average of 93.9% of students have completed 8th grade and an average of 91.8% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Williamsburg, IA | 3,152 | 83% | 72.9% |
| Marengo, IA | 2,407 | 81% | 68.2% |
| Oxford, IA | 707 | 77% | 60.4% |
| Wellman, IA | 1,428 | 74% | 53.1% |
| Victor, IA | 974 | 73% | 52.6% |
| Parnell, IA | 210 | n/a |
| City | Population | Avg. Test Scores | National Avg. |
| Selden, KS | 210 | 43% | 11.5% |
| Point Reyes Station, CA | 210 | 37% | 22.9% |
| Shungnak, AK | 210 | 10% | 79.2% |
| Farson, WY | 211 | 63% | 31.9% |
| Casstown, OH | 209 | 83% | 72.6% |
| Parnell, IA | 210 | n/a |
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