| Index | Defiance | 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 | Defiance | Missouri | National |
| Completed 8th grade | 91.1% | 86.0% | 84.3% |
| Completed high school | 91.1% | 84.2% | 83.0% |
| Completed some college | 53.6% | 57.7% | 59.4% |
| Completed associate degree | 25.9% | 35.2% | 38.5% |
| Completed bachelors | 17.9% | 27.6% | 30.3% |
| Completed masters | 0.0% | 10.4% | 11.5% |
| Completed professional degree | 0.0% | 2.8% | 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 Defiance. Using the proficiency score averages, the average test scores for Defiance, MO schools is n/a. The average student to teacher ratio is n/a. In Defiance, MO, an average of 91.1% of students have completed 8th grade and an average of 91.1% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Dardenne Prairie, MO | 13,385 | 73% | 51.0% |
| Lake St. Louis, MO | 16,357 | 71% | 48.4% |
| Weldon Spring, MO | 5,536 | 70% | 45.5% |
| Chesterfield, MO | 47,603 | 69% | 43.2% |
| Cottleville, MO | 5,439 | 69% | 43.1% |
| Defiance, MO | 68 | n/a |
| City | Population | Avg. Test Scores | National Avg. |
| Ekwok, AK | 68 | 50% | 4.2% |
| Winfred, SD | 68 | 60% | 25.0% |
| Silex, MO | 67 | 52% | 8.3% |
| Graysville, OH | 67 | 67% | 39.6% |
| Orlando, OK | 67 | 50% | 4.2% |
| Defiance, MO | 68 | n/a |
Here are the best places to live in Missouri
Most Dangerous States In The US
Check out the 10 most dangerous cities in Missouri
Check out the 10 safest cities in Missouri