| Index | Decker | Indiana | National |
| Average Test Scores | n/a | 46% | 48% |
| Student/Teacher ratio | n/a | 22:1 | 16:1 |
| Total public schools | n/a | 1,755 | 79,221 |
| Total private schools | n/a | 675 | 24,874 |
| Total post-secondary schools | n/a | 141 | 7,963 |
| Index | Decker | Indiana | National |
| Completed 8th grade | 85.1% | 84.6% | 84.3% |
| Completed high school | 81.0% | 82.9% | 83.0% |
| Completed some college | 31.6% | 53.8% | 59.4% |
| Completed associate degree | 10.9% | 33.0% | 38.5% |
| Completed bachelors | 4.6% | 24.6% | 30.3% |
| Completed masters | 0.6% | 8.9% | 11.5% |
| Completed professional degree | 0.0% | 2.4% | 3.3% |
| Completed doctorate | 0.0% | 1.0% | 1.3% |
There are a total of n/a public schools, n/a private schools and n/a post-secondary schools in Decker. Using the proficiency score averages, the average test scores for Decker, IN schools is n/a. The average student to teacher ratio is n/a. In Decker, IN, an average of 85.1% of students have completed 8th grade and an average of 81.0% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Francisco, IN | 541 | 65% | 35.4% |
| Vincennes, IN | 17,091 | 43% | 9.5% |
| Princeton, IN | 8,716 | 42% | 12.2% |
| Allendale, IL | 655 | 42% | 12.5% |
| Petersburg, IN | 2,315 | 38% | 20.1% |
| Decker, IN | 256 | n/a |
| City | Population | Avg. Test Scores | National Avg. |
| Loganville, WI | 256 | 70% | 45.8% |
| Trenton, NC | 256 | 43% | 10.8% |
| Centerview, MO | 256 | 41% | 15.1% |
| Petersham, MA | 256 | 50% | 3.1% |
| Peetz, CO | 256 | 38% | 21.9% |
| Decker, IN | 256 | n/a |
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