| Index | St. David | Illinois | National |
| Average Test Scores | n/a | 33% | 48% |
| Student/Teacher ratio | n/a | 18:1 | 16:1 |
| Total public schools | n/a | 3,938 | 79,221 |
| Total private schools | n/a | 1,438 | 24,874 |
| Total post-secondary schools | n/a | 306 | 7,963 |
| Index | St. David | Illinois | National |
| Completed 8th grade | 83.5% | 86.2% | 84.3% |
| Completed high school | 81.6% | 84.7% | 83.0% |
| Completed some college | 50.2% | 61.8% | 59.4% |
| Completed associate degree | 22.5% | 40.7% | 38.5% |
| Completed bachelors | 8.4% | 32.9% | 30.3% |
| Completed masters | 1.6% | 12.7% | 11.5% |
| Completed professional degree | 0.2% | 3.4% | 3.3% |
| Completed doctorate | 0.0% | 1.2% | 1.3% |
There are a total of n/a public schools, n/a private schools and n/a post-secondary schools in St. David. Using the proficiency score averages, the average test scores for St. David, IL schools is n/a. The average student to teacher ratio is n/a. In St. David, IL, an average of 83.5% of students have completed 8th grade and an average of 81.6% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Glasford, IL | 897 | 38% | 21.2% |
| Canton, IL | 13,600 | 33% | 31.5% |
| Farmington, IL | 1,939 | 32% | 33.3% |
| Havana, IL | 3,178 | 31% | 36.5% |
| Cuba, IL | 1,066 | 27% | 43.1% |
| St. David, IL | 560 | n/a |
| City | Population | Avg. Test Scores | National Avg. |
| North Walpole, NH | 560 | 65% | 35.4% |
| Fessenden, ND | 560 | 50% | 3.6% |
| McCool Junction, NE | 559 | 43% | 9.9% |
| Scottsville, VA | 559 | 70% | 44.8% |
| Keota, OK | 559 | 24% | 51.0% |
| St. David, IL | 560 | n/a |
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