| 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 | 983 | 81% | 69.4% |
| Laurel, IA | 200 | 80% | 66.7% |
| Montezuma, IA | 1,550 | 80% | 66.0% |
| Brooklyn, IA | 1,725 | 75% | 55.2% |
| Gilman, IA | 555 | 71% | 47.9% |
| Grinnell, IA | 9,424 | 79% | 64.6% |
| City | Population | Avg. Test Scores | National Avg. |
| Greenville, RI | 9,423 | 54% | 13.3% |
| Nolensville, TN | 9,422 | 67% | 40.4% |
| Lenoir City, TN | 9,420 | 48% | 0.2% |
| Charlotte, MI | 9,419 | 44% | 8.5% |
| Valley, AL | 9,429 | 40% | 17.2% |
| Grinnell, IA | 9,424 | 79% | 64.6% |
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