| Index | Shellsburg | Iowa | National |
| Average Test Scores | 82% | 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 | Shellsburg | Iowa | National |
| Completed 8th grade | 91.7% | 89.2% | 84.3% |
| Completed high school | 90.8% | 87.7% | 83.0% |
| Completed some college | 54.0% | 59.8% | 59.4% |
| Completed associate degree | 26.7% | 38.4% | 38.5% |
| Completed bachelors | 14.6% | 27.2% | 30.3% |
| Completed masters | 3.5% | 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 Shellsburg. Using the proficiency score averages, the average test scores for Shellsburg, IA schools is 82%. The average student to teacher ratio is n/a. In Shellsburg, IA, an average of 91.7% of students have completed 8th grade and an average of 90.8% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Center Point, IA | 2,548 | 86% | 78.6% |
| Urbana, IA | 1,462 | 82% | 70.8% |
| Robins, IA | 3,510 | 81% | 67.7% |
| Vinton, IA | 5,075 | 80% | 66.0% |
| Atkins, IA | 2,069 | 77% | 60.4% |
| Shellsburg, IA | 806 | 82% | 70.8% |
| City | Population | Avg. Test Scores | National Avg. |
| Henning, MN | 806 | 62% | 29.2% |
| Clyde, KS | 806 | 25% | 47.9% |
| Gibbon, MN | 806 | 55% | 14.1% |
| Cobb, CA | 805 | 52% | 8.3% |
| Madrid, NY | 805 | 42% | 12.5% |
| Shellsburg, IA | 806 | 82% | 70.8% |
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