| Index | Marlborough | 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 | Marlborough | Missouri | National |
| Completed 8th grade | 89.7% | 86.0% | 84.3% |
| Completed high school | 89.7% | 84.2% | 83.0% |
| Completed some college | 74.8% | 57.7% | 59.4% |
| Completed associate degree | 50.2% | 35.2% | 38.5% |
| Completed bachelors | 44.9% | 27.6% | 30.3% |
| Completed masters | 10.7% | 10.4% | 11.5% |
| Completed professional degree | 0.9% | 2.8% | 3.3% |
| Completed doctorate | 0.9% | 1.2% | 1.3% |
There are a total of n/a public schools, n/a private schools and n/a post-secondary schools in Marlborough. Using the proficiency score averages, the average test scores for Marlborough, MO schools is n/a. The average student to teacher ratio is n/a. In Marlborough, MO, an average of 89.7% of students have completed 8th grade and an average of 89.7% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Clayton, MO | 16,763 | 73% | 52.7% |
| Brentwood, MO | 7,986 | 70% | 45.6% |
| Olivette, MO | 7,837 | 70% | 44.8% |
| Chesterfield, MO | 47,603 | 69% | 43.2% |
| Kirkwood, MO | 27,772 | 69% | 43.1% |
| Marlborough, MO | 2,727 | n/a |
| City | Population | Avg. Test Scores | National Avg. |
| Stigler, OK | 2,727 | 30% | 38.2% |
| Riverdale, CA | 2,727 | 41% | 14.8% |
| Cokato, MN | 2,726 | 53% | 10.2% |
| Gervais, OR | 2,726 | 42% | 12.3% |
| Dayton, OR | 2,726 | 38% | 21.2% |
| Marlborough, MO | 2,727 | n/a |
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