| Index | Fairfield | Illinois | National |
| Average Test Scores | 40% | 33% | 48% |
| Student/Teacher ratio | 15:1 | 18:1 | 16:1 |
| Total public schools | 6 | 3,938 | 79,221 |
| Total private schools | n/a | 1,438 | 24,874 |
| Total post-secondary schools | n/a | 306 | 7,963 |
| Index | Fairfield | Illinois | National |
| Completed 8th grade | 84.4% | 86.2% | 84.3% |
| Completed high school | 81.8% | 84.7% | 83.0% |
| Completed some college | 50.9% | 61.8% | 59.4% |
| Completed associate degree | 26.0% | 40.7% | 38.5% |
| Completed bachelors | 14.0% | 32.9% | 30.3% |
| Completed masters | 4.3% | 12.7% | 11.5% |
| Completed professional degree | 1.0% | 3.4% | 3.3% |
| Completed doctorate | 0.3% | 1.2% | 1.3% |
There are a total of 6 public schools, n/a private schools and n/a post-secondary schools in Fairfield. Using the proficiency score averages, the average test scores for Fairfield, IL schools is 40%. The average student to teacher ratio is 15:1. In Fairfield, IL, an average of 84.4% of students have completed 8th grade and an average of 81.8% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Johnsonville, IL | 50 | 50% | 4.2% |
| Mount Erie, IL | 114 | 40% | 16.7% |
| Jeffersonville, IL | 333 | 35% | 28.1% |
| Wayne City, IL | 934 | 31% | 35.4% |
| Cisne, IL | 505 | 27% | 43.2% |
| Fairfield, IL | 4,912 | 40% | 17.3% |
| City | Population | Avg. Test Scores | National Avg. |
| Pascoag, RI | 4,911 | 31% | 35.4% |
| Demarest, NJ | 4,911 | 80% | 67.4% |
| Falmouth, VA | 4,911 | 78% | 63.2% |
| Northvale, NJ | 4,911 | 72% | 49.0% |
| Vandergrift, PA | 4,914 | 60% | 25.7% |
| Fairfield, IL | 4,912 | 40% | 17.3% |
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