| Index | Dexter | Iowa | National |
| Average Test Scores | 65% | 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 | Dexter | Iowa | National |
| Completed 8th grade | 91.2% | 89.2% | 84.3% |
| Completed high school | 90.0% | 87.7% | 83.0% |
| Completed some college | 57.8% | 59.8% | 59.4% |
| Completed associate degree | 34.9% | 38.4% | 38.5% |
| Completed bachelors | 23.0% | 27.2% | 30.3% |
| Completed masters | 6.7% | 8.7% | 11.5% |
| Completed professional degree | 1.7% | 2.7% | 3.3% |
| Completed doctorate | 0.6% | 1.1% | 1.3% |
There are a total of n/a public schools, n/a private schools and n/a post-secondary schools in Dexter. Using the proficiency score averages, the average test scores for Dexter, IA schools is 65%. The average student to teacher ratio is n/a. In Dexter, IA, an average of 91.2% of students have completed 8th grade and an average of 90.0% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Van Meter, IA | 1,436 | 86% | 79.9% |
| Adel, IA | 5,057 | 84% | 74.5% |
| Dallas Center, IA | 1,744 | 81% | 68.2% |
| Guthrie Center, IA | 1,599 | 76% | 57.8% |
| Stuart, IA | 1,660 | 75% | 55.7% |
| Dexter, IA | 585 | 65% | 34.4% |
| City | Population | Avg. Test Scores | National Avg. |
| Lee, FL | 585 | 62% | 29.2% |
| Soldiers Grove, WI | 585 | 29% | 40.6% |
| Hutsonville, IL | 585 | 30% | 38.0% |
| Sandy Creek, NY | 585 | 59% | 22.6% |
| Motley, MN | 585 | 45% | 7.3% |
| Dexter, IA | 585 | 65% | 34.4% |
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