| Index | Armstrong | Iowa | National |
| Average Test Scores | 65% | 69% | 48% |
| Student/Teacher ratio | n/a | 13:1 | 16:1 |
| Total public schools | n/a | 1,101 | 79,221 |
| Total private schools | n/a | 208 | 24,874 |
| Total post-secondary schools | n/a | 96 | 7,963 |
| Index | Armstrong | Iowa | National |
| Completed 8th grade | 89.1% | 89.2% | 84.3% |
| Completed high school | 86.1% | 87.7% | 83.0% |
| Completed some college | 52.9% | 59.8% | 59.4% |
| Completed associate degree | 25.0% | 38.4% | 38.5% |
| Completed bachelors | 12.9% | 27.2% | 30.3% |
| Completed masters | 1.7% | 8.7% | 11.5% |
| Completed professional degree | 0.0% | 2.7% | 3.3% |
| Completed doctorate | 0.0% | 1.1% | 1.3% |
There are a total of n/a public schools, n/a private schools and n/a post-secondary schools in Armstrong. Using the proficiency score averages, the average test scores for Armstrong, IA schools is 65%. The average student to teacher ratio is n/a. In Armstrong, IA, an average of 89.1% of students have completed 8th grade and an average of 86.1% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Fenton, IA | 232 | 72% | 50.0% |
| Swea City, IA | 639 | 63% | 31.8% |
| Graettinger, IA | 1,044 | 46% | 4.2% |
| Armstrong, IA | 846 | 65% | 35.4% |
| City | Population | Avg. Test Scores | National Avg. |
| Rosedale, IN | 846 | 45% | 7.3% |
| Richardton, ND | 847 | 32% | 33.3% |
| Newell, IA | 845 | 66% | 38.2% |
| Zia Pueblo, NM | 845 | 20% | 58.3% |
| Cissna Park, IL | 847 | 43% | 10.4% |
| Armstrong, IA | 846 | 65% | 35.4% |
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