| Index | Sullivan | Missouri | National |
| Average Test Scores | 63% | 44% | 48% |
| Student/Teacher ratio | 15:1 | 14:1 | 16:1 |
| Total public schools | 6 | 1,899 | 79,221 |
| Total private schools | 2 | 531 | 24,874 |
| Total post-secondary schools | 1 | 213 | 7,963 |
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| Index | Sullivan | Missouri | National |
| Completed 8th grade | 73.4% | 86.0% | 84.3% |
| Completed high school | 71.0% | 84.2% | 83.0% |
| Completed some college | 42.1% | 57.7% | 59.4% |
| Completed associate degree | 20.6% | 35.2% | 38.5% |
| Completed bachelors | 12.1% | 27.6% | 30.3% |
| Completed masters | 4.0% | 10.4% | 11.5% |
| Completed professional degree | 0.7% | 2.8% | 3.3% |
| Completed doctorate | 0.2% | 1.2% | 1.3% |
There are a total of 6 public schools, 2 private schools and 1 post-secondary schools in Sullivan. Using the proficiency score averages, the average test scores for Sullivan, MO schools is 63%. The average student to teacher ratio is 15:1. In Sullivan, MO, an average of 73.4% of students have completed 8th grade and an average of 71.0% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Gerald, MO | 1,140 | 50% | 3.1% |
| Cuba, MO | 3,371 | 47% | 3.1% |
| Bourbon, MO | 1,925 | 44% | 9.0% |
| St. Clair, MO | 4,878 | 42% | 12.2% |
| Sullivan, MO | 6,672 | 63% | 31.7% |
| City | Population | Avg. Test Scores | National Avg. |
| Sidney, NE | 6,673 | 56% | 17.4% |
| Harrisburg, SD | 6,669 | 54% | 13.3% |
| Cheverly, MD | 6,676 | 27% | 43.8% |
| Crockett, TX | 6,663 | 29% | 39.1% |
| Plattsmouth, NE | 6,681 | 49% | 2.4% |
| Sullivan, MO | 6,672 | 63% | 31.7% |
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