| Index | Kirby | Texas | National |
| Average Test Scores | n/a | 47% | 48% |
| Student/Teacher ratio | n/a | 14:1 | 16:1 |
| Total public schools | n/a | 7,418 | 79,221 |
| Total private schools | n/a | 1,267 | 24,874 |
| Total post-secondary schools | n/a | 463 | 7,963 |
| Index | Kirby | Texas | National |
| Completed 8th grade | 78.5% | 79.3% | 84.3% |
| Completed high school | 77.0% | 77.8% | 83.0% |
| Completed some college | 48.2% | 57.3% | 59.4% |
| Completed associate degree | 18.3% | 34.9% | 38.5% |
| Completed bachelors | 11.1% | 28.1% | 30.3% |
| Completed masters | 2.4% | 9.6% | 11.5% |
| Completed professional degree | 0.9% | 2.6% | 3.3% |
| Completed doctorate | 0.3% | 1.1% | 1.3% |
There are a total of n/a public schools, n/a private schools and n/a post-secondary schools in Kirby. Using the proficiency score averages, the average test scores for Kirby, TX schools is n/a. The average student to teacher ratio is n/a. In Kirby, TX, an average of 78.5% of students have completed 8th grade and an average of 77.0% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Castle Hills, TX | 4,459 | 85% | 76.0% |
| Live Oak, TX | 16,118 | 83% | 72.4% |
| Randolph AFB, TX | 1,188 | 66% | 36.8% |
| Garden Ridge, TX | 4,054 | 66% | 36.5% |
| Cibolo, TX | 30,333 | 57% | 18.5% |
| Kirby, TX | 8,709 | n/a |
| City | Population | Avg. Test Scores | National Avg. |
| Folsom, PA | 8,706 | 66% | 37.5% |
| Angola, IN | 8,706 | 43% | 11.0% |
| Rawlins, WY | 8,716 | 44% | 8.9% |
| Princeton, IN | 8,716 | 42% | 12.2% |
| Lake Norman of Catawba, NC | 8,701 | 62% | 28.1% |
| Kirby, TX | 8,709 | n/a |
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