| Index | Fairfield | Iowa | National |
| Average Test Scores | 68% | 69% | 48% |
| Student/Teacher ratio | 14:1 | 13:1 | 16:1 |
| Total public schools | 5 | 1,101 | 79,221 |
| Total private schools | 2 | 208 | 24,874 |
| Total post-secondary schools | 1 | 96 | 7,963 |
| Index | Fairfield | Iowa | National |
| Completed 8th grade | 93.3% | 89.2% | 84.3% |
| Completed high school | 92.1% | 87.7% | 83.0% |
| Completed some college | 73.8% | 59.8% | 59.4% |
| Completed associate degree | 48.9% | 38.4% | 38.5% |
| Completed bachelors | 38.1% | 27.2% | 30.3% |
| Completed masters | 17.7% | 8.7% | 11.5% |
| Completed professional degree | 5.1% | 2.7% | 3.3% |
| Completed doctorate | 2.8% | 1.1% | 1.3% |
There are a total of 5 public schools, 2 private schools and 1 post-secondary schools in Fairfield. Using the proficiency score averages, the average test scores for Fairfield, IA schools is 68%. The average student to teacher ratio is 14:1. In Fairfield, IA, an average of 93.3% of students have completed 8th grade and an average of 92.1% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Packwood, IA | 586 | 69% | 44.1% |
| Douds, IA | 84 | 65% | 34.4% |
| Eldon, IA | 921 | 58% | 20.8% |
| Fairfield, IA | 10,327 | 68% | 41.0% |
| City | Population | Avg. Test Scores | National Avg. |
| Granbury, TX | 10,325 | 41% | 15.2% |
| Sauk Village, IL | 10,319 | 6% | 88.0% |
| Hillsdale, NJ | 10,317 | 71% | 46.9% |
| Lyons, IL | 10,338 | 25% | 49.0% |
| Sedona, AZ | 10,341 | 41% | 14.4% |
| Fairfield, IA | 10,327 | 68% | 41.0% |
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