| Index | St. Thomas | Missouri | National |
| Average Test Scores | n/a | 44% | 48% |
| Student/Teacher ratio | n/a | 14:1 | 16:1 |
| Total public schools | n/a | 1,899 | 79,221 |
| Total private schools | n/a | 531 | 24,874 |
| Total post-secondary schools | n/a | 213 | 7,963 |
| Index | St. Thomas | Missouri | National |
| Completed 8th grade | 95.4% | 86.0% | 84.3% |
| Completed high school | 92.2% | 84.2% | 83.0% |
| Completed some college | 49.0% | 57.7% | 59.4% |
| Completed associate degree | 41.2% | 35.2% | 38.5% |
| Completed bachelors | 31.4% | 27.6% | 30.3% |
| Completed masters | 8.5% | 10.4% | 11.5% |
| Completed professional degree | 1.3% | 2.8% | 3.3% |
| Completed doctorate | 1.3% | 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. Thomas. Using the proficiency score averages, the average test scores for St. Thomas, MO schools is n/a. The average student to teacher ratio is n/a. In St. Thomas, MO, an average of 95.4% of students have completed 8th grade and an average of 92.2% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| St. Elizabeth, MO | 445 | 69% | 42.7% |
| Russellville, MO | 832 | 51% | 6.9% |
| Westphalia, MO | 411 | 48% | 1.0% |
| Vienna, MO | 897 | 46% | 5.2% |
| Jefferson City, MO | 42,670 | 44% | 8.1% |
| St. Thomas, MO | 292 | n/a |
| City | Population | Avg. Test Scores | National Avg. |
| Campbell Hill, IL | 292 | 26% | 45.1% |
| Garden City, TX | 292 | 72% | 50.0% |
| Centennial, WY | 292 | 50% | 4.2% |
| Oktaha, OK | 292 | 36% | 26.0% |
| Joy, IL | 292 | 27% | 43.8% |
| St. Thomas, MO | 292 | n/a |
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