| Index | St. Johns | Arizona | National |
| Average Test Scores | 59% | 43% | 48% |
| Student/Teacher ratio | 17:1 | 18:1 | 16:1 |
| Total public schools | 4 | 1,863 | 79,221 |
| Total private schools | n/a | 316 | 24,874 |
| Total post-secondary schools | n/a | 148 | 7,963 |
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| Index | St. Johns | Arizona | National |
| Completed 8th grade | 93.3% | 83.7% | 84.3% |
| Completed high school | 87.9% | 82.2% | 83.0% |
| Completed some college | 63.6% | 62.0% | 59.4% |
| Completed associate degree | 16.6% | 36.5% | 38.5% |
| Completed bachelors | 10.0% | 28.0% | 30.3% |
| Completed masters | 3.8% | 10.4% | 11.5% |
| Completed professional degree | 0.2% | 2.9% | 3.3% |
| Completed doctorate | 0.0% | 1.2% | 1.3% |
There are a total of 4 public schools, n/a private schools and n/a post-secondary schools in St. Johns. Using the proficiency score averages, the average test scores for St. Johns, AZ schools is 59%. The average student to teacher ratio is 17:1. In St. Johns, AZ, an average of 93.3% of students have completed 8th grade and an average of 87.9% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Concho, AZ | 0 | 27% | 43.8% |
| St. Johns, AZ | 3,507 | 59% | 22.1% |
| City | Population | Avg. Test Scores | National Avg. |
| Willcox, AZ | 3,507 | 47% | 3.1% |
| Perham, MN | 3,506 | 59% | 23.3% |
| Meadow Vista, CA | 3,508 | 62% | 29.2% |
| Bridgeville, DE | 3,508 | 37% | 22.4% |
| Mission Hills, CA | 3,509 | 50% | 3.1% |
| St. Johns, AZ | 3,507 | 59% | 22.1% |
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