| Index | St. Johns CDP | Arizona | National |
| Average Test Scores | n/a | 43% | 48% |
| Student/Teacher ratio | n/a | 18:1 | 16:1 |
| Total public schools | n/a | 1,863 | 79,221 |
| Total private schools | n/a | 316 | 24,874 |
| Total post-secondary schools | n/a | 148 | 7,963 |
| Index | St. Johns CDP | Arizona | National |
| Completed 8th grade | 68.2% | 83.7% | 84.3% |
| Completed high school | 63.3% | 82.2% | 83.0% |
| Completed some college | 54.1% | 62.0% | 59.4% |
| Completed associate degree | 30.0% | 36.5% | 38.5% |
| Completed bachelors | 16.9% | 28.0% | 30.3% |
| Completed masters | 4.6% | 10.4% | 11.5% |
| Completed professional degree | 0.0% | 2.9% | 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. Johns CDP. Using the proficiency score averages, the average test scores for St. Johns CDP, AZ schools is n/a. The average student to teacher ratio is n/a. In St. Johns CDP, AZ, an average of 68.2% of students have completed 8th grade and an average of 63.3% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| St. Johns, AZ | 3,507 | 59% | 22.1% |
| Concho, AZ | 0 | 27% | 43.8% |
| St. Johns CDP, AZ | 726 | n/a |
| City | Population | Avg. Test Scores | National Avg. |
| Dieterich, IL | 726 | 53% | 10.9% |
| Calhoun, KY | 726 | 52% | 8.3% |
| Holland, IN | 726 | 75% | 55.2% |
| Morning Sun, IA | 726 | 75% | 56.3% |
| Chesapeake City, MD | 725 | 52% | 8.7% |
| St. Johns CDP, AZ | 726 | n/a |
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