| Index | Decorah | Iowa | National |
| Average Test Scores | 89% | 78% | 49% |
| Student/Teacher ratio | 12:1 | 13:1 | 16:1 |
| Total public schools | 6 | 1,101 | 79,221 |
| Total private schools | 1 | 208 | 24,874 |
| Total post-secondary schools | 1 | 96 | 7,963 |
| Index | Decorah | Iowa | National |
| Completed 8th grade | 93.7% | 89.2% | 84.3% |
| Completed high school | 93.1% | 87.7% | 83.0% |
| Completed some college | 69.0% | 59.8% | 59.4% |
| Completed associate degree | 51.6% | 38.4% | 38.5% |
| Completed bachelors | 41.6% | 27.2% | 30.3% |
| Completed masters | 16.9% | 8.7% | 11.5% |
| Completed professional degree | 7.0% | 2.7% | 3.3% |
| Completed doctorate | 5.7% | 1.1% | 1.3% |
There are a total of 6 public schools, 1 private schools and 1 post-secondary schools in Decorah. Using the proficiency score averages, the average test scores for Decorah, IA schools is 89%. The average student to teacher ratio is 12:1. In Decorah, IA, an average of 93.7% of students have completed 8th grade and an average of 93.1% have completed high school.
| City, State | Population | Avg. Test Scores | National Avg. |
| Jackson Junction, IA | 47 | 88% | 79% |
| Calmar, IA | 1,023 | 87% | 77% |
| Ossian, IA | 962 | 81% | 64% |
| Decorah, IA | 7,985 | 89% | 81% |
| City, State | Population | Avg. Test Scores | National Avg. |
| Pismo Beach, CA | 7,984 | 53% | 8% |
| Ilion, NY | 7,986 | 66% | 34% |
| Summit Park, UT | 7,986 | 58% | 18% |
| Newton, NJ | 7,982 | 44% | 11% |
| Oak Brook, IL | 7,988 | 78% | 59% |
| Decorah, IA | 7,985 | 89% | 81% |
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