| Statistic | Shenandoah | Iowa | National |
| Population | 4,859 | 3,150,011 | 326,569,308 |
| Population density (sq mi) | 1,302 | 56 | 94 |
| Median age | 41.6 | 38.3 | 38.2 |
| Male/Female ratio | 0.9:1 | 1.0:1 | 1.0:1 |
| Married (15yrs & older) | 64% | 59% | 55% |
| Families w/ Kids under 18 | 43% | 44% | 42% |
| Speak English | 97% | 92% | 78% |
| Speak Spanish | 2% | 4% | 13% |
| Race | Shenandoah | Iowa | National |
| White | 92.82% | 89.09% | 70.42% |
| Black | 2.47% | 3.72% | 12.62% |
| Asian | 0.25% | 2.52% | 5.64% |
| American Indian | 0.00% | 0.33% | 0.82% |
| Native Hawaiian | 0.14% | 0.13% | 0.19% |
| Mixed race | 3.60% | 2.95% | 5.17% |
| Other race | 0.72% | 1.26% | 5.14% |
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