| Index | Decatur | Texas | National |
| Average Test Scores | 45% | 47% | 48% |
| Student/Teacher ratio | 14:1 | 14:1 | 16:1 |
| Total public schools | 6 | 7,418 | 79,221 |
| Total private schools | n/a | 1,267 | 24,874 |
| Total post-secondary schools | n/a | 463 | 7,963 |
| Index | Decatur | Texas | National |
| Completed 8th grade | 79.6% | 79.3% | 84.3% |
| Completed high school | 78.8% | 77.8% | 83.0% |
| Completed some college | 53.0% | 57.3% | 59.4% |
| Completed associate degree | 26.5% | 34.9% | 38.5% |
| Completed bachelors | 19.2% | 28.1% | 30.3% |
| Completed masters | 3.7% | 9.6% | 11.5% |
| Completed professional degree | 0.4% | 2.6% | 3.3% |
| Completed doctorate | 0.0% | 1.1% | 1.3% |
There are a total of 6 public schools, n/a private schools and n/a post-secondary schools in Decatur. Using the proficiency score averages, the average test scores for Decatur, TX schools is 45%. The average student to teacher ratio is 14:1. In Decatur, TX, an average of 79.6% of students have completed 8th grade and an average of 78.8% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Alvord, TX | 1,104 | 60% | 25.0% |
| Paradise, TX | 502 | 57% | 18.2% |
| Chico, TX | 1,166 | 52% | 8.7% |
| Rhome, TX | 1,748 | 44% | 8.0% |
| Bridgeport, TX | 6,498 | 44% | 8.7% |
| Decatur, TX | 6,976 | 45% | 5.7% |
| City | Population | Avg. Test Scores | National Avg. |
| Benton, IL | 6,977 | 27% | 44.4% |
| Milltown, NJ | 6,973 | 59% | 23.4% |
| Oak Ridge, NC | 6,979 | 75% | 55.2% |
| King, NC | 6,980 | 42% | 12.7% |
| Old Greenwich, CT | 6,980 | 87% | 80.2% |
| Decatur, TX | 6,976 | 45% | 5.7% |
Here are the best places to live in Texas
See the best places to live in Decatur
Check out the 10 safest cities in Texas
These are the largest cities in Texas