| Index | Grinnell | Iowa | National |
| Average Test Scores | 79% | 69% | 48% |
| Student/Teacher ratio | 13:1 | 13:1 | 16:1 |
| Total public schools | 5 | 1,101 | 79,221 |
| Total private schools | 1 | 208 | 24,874 |
| Total post-secondary schools | 1 | 96 | 7,963 |
| Index | Grinnell | Iowa | National |
| Completed 8th grade | 89.6% | 89.2% | 84.3% |
| Completed high school | 88.9% | 87.7% | 83.0% |
| Completed some college | 62.3% | 59.8% | 59.4% |
| Completed associate degree | 40.1% | 38.4% | 38.5% |
| Completed bachelors | 31.1% | 27.2% | 30.3% |
| Completed masters | 14.9% | 8.7% | 11.5% |
| Completed professional degree | 7.1% | 2.7% | 3.3% |
| Completed doctorate | 4.7% | 1.1% | 1.3% |
There are a total of 5 public schools, 1 private schools and 1 post-secondary schools in Grinnell. Using the proficiency score averages, the average test scores for Grinnell, IA schools is 79%. The average student to teacher ratio is 13:1. In Grinnell, IA, an average of 89.6% of students have completed 8th grade and an average of 88.9% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Sully, IA | 843 | 81% | 69.0% |
| Laurel, IA | 358 | 80% | 66.2% |
| Montezuma, IA | 1,591 | 80% | 65.6% |
| Brooklyn, IA | 1,422 | 75% | 54.8% |
| Gilman, IA | 598 | 71% | 47.5% |
| Grinnell, IA | 9,112 | 79% | 64.2% |
| City | Population | Avg. Test Scores | National Avg. |
| Rawlins, WY | 9,114 | 44% | 9.1% |
| Rock Falls, IL | 9,104 | 30% | 37.2% |
| Box Elder, SD | 9,126 | 54% | 11.4% |
| New Baltimore, VA | 9,097 | 86% | 77.7% |
| Shawano, WI | 9,130 | 33% | 30.7% |
| Grinnell, IA | 9,112 | 79% | 64.2% |
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