| Index | Castalia | Iowa | National |
| Income per capita | $38,448 | $42,672 | $44,883 |
| Median household income | $65,827 | $81,387 | $81,333 |
| Median income owner occupied | $74,741 | $98,724 | $106,172 |
| Median income renter occupied | $0 | $45,890 | $52,080 |
| Median earnings male | $34,288 | $54,047 | $54,343 |
| Median earnings female | $33,343 | $36,462 | $38,439 |
| Unemployment rate | 4.3% | 3.2% | 4.9% |
| Poverty level | 15.4% | 12.3% | 15.1% |


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| Labour Type | Male | Female |
| Construction industry | 33.3% | 33.3% |
| Manufacturing sector | 12.5% | 12.5% |
| Financial & insurance services | 0.0% | 0.0% |
| Wholesale & retail services | 14.6% | 14.6% |
| Public administration | 0.0% | 0.0% |
| Transportation, warehousing & utilities | 2.1% | 2.1% |
| Education, health & social services | 10.4% | 10.4% |
| Other | 27.1% | 27.1% |
| City | Population | Household Income | National Avg. |
| St. Olaf, IA | 134 | $93,878 | 15.4% |
| Calmar, IA | 1,011 | $89,414 | 9.9% |
| Fort Atkinson, IA | 390 | $87,630 | 7.7% |
| Clermont, IA | 499 | $83,031 | 2.1% |
| Decorah, IA | 7,825 | $82,733 | 1.7% |
| Castalia, IA | 172 | $65,827 | 19.1% |
| City | Population | Household Income | National Avg. |
| Elgin, AZ | 172 | $75,100 | 7.7% |
| Vernon, AZ | 172 | $0 | 100.0% |
| Sierraville, CA | 172 | $0 | 100.0% |
| Sisquoc, CA | 172 | $76,232 | 6.3% |
| Randolph, KS | 172 | $94,672 | 16.4% |
| Castalia, IA | 172 | $65,827 | 19.1% |