| Index | Killen | Alabama | National |
| Average Test Scores | 58% | 44% | 48% |
| Student/Teacher ratio | 11:1 | 15:1 | 16:1 |
| Total public schools | 3 | 1,307 | 79,221 |
| Total private schools | n/a | 353 | 24,874 |
| Total post-secondary schools | n/a | 102 | 7,963 |
| Index | Killen | Alabama | National |
| Completed 8th grade | 82.4% | 80.7% | 84.3% |
| Completed high school | 80.9% | 79.2% | 83.0% |
| Completed some college | 56.9% | 53.8% | 59.4% |
| Completed associate degree | 31.8% | 31.9% | 38.5% |
| Completed bachelors | 23.1% | 24.0% | 30.3% |
| Completed masters | 8.1% | 8.9% | 11.5% |
| Completed professional degree | 2.1% | 2.5% | 3.3% |
| Completed doctorate | 0.9% | 1.0% | 1.3% |
There are a total of 3 public schools, n/a private schools and n/a post-secondary schools in Killen. Using the proficiency score averages, the average test scores for Killen, AL schools is 58%. The average student to teacher ratio is 11:1. In Killen, AL, an average of 82.4% of students have completed 8th grade and an average of 80.9% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Muscle Shoals, AL | 14,379 | 66% | 37.2% |
| Lexington, AL | 809 | 55% | 13.5% |
| Rogersville, AL | 1,464 | 54% | 12.5% |
| Florence, AL | 40,652 | 54% | 12.3% |
| Town Creek, AL | 943 | 43% | 11.5% |
| Killen, AL | 1,146 | 58% | 20.8% |
| City | Population | Avg. Test Scores | National Avg. |
| Granger, TX | 1,146 | 43% | 10.4% |
| Cleveland, NC | 1,147 | 46% | 5.2% |
| Pierceton, IN | 1,145 | 32% | 33.3% |
| Daniel, UT | 1,147 | 42% | 13.5% |
| Sperry, OK | 1,145 | 31% | 35.4% |
| Killen, AL | 1,146 | 58% | 20.8% |
Here are the best places to live in Alabama
Check out the 10 safest cities in Alabama
See the best places to live in Killen
These are the largest cities in Alabama