| Index | Castalia | Iowa | National |
| Median home price | $80,000 | $132,800 | $184,700 |
| Median rent asked | $615 | $715 | $949 |
| Avg. people per household | 1.7 | 2.4 | 2.6 |
| Owner occupied households | 86.0% | 71.1% | 63.6% |
| Renter occupied households | 14.0% | 28.9% | 36.4% |
| Population | Home Price | National Avg. | |
| Hawkeye, IA | 488 | $65,500 | 65% |
| St. Olaf, IA | 128 | $71,000 | 62% |
| St. Lucas, IA | 129 | $79,000 | 57% |
| Elgin, IA | 638 | $82,200 | 55% |
| Postville, IA | 2,528 | $94,800 | 49% |
| Castalia, IA | 169 | $80,000 | 57% |
| Population | Home Price | National Avg. | |
| Dunmor, KY | 169 | $132,600 | 28% |
| Campo Verde, TX | 169 | $0 | 100% |
| Amsterdam, MT | 169 | $255,600 | 38% |
| Admire, KS | 169 | $0 | 100% |
| Monroe, OK | 169 | $86,000 | 53% |
| Castalia, IA | 169 | $80,000 | 57% |
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