| Index | Promise City | Iowa | National |
| Income per capita | $19,296 | $28,872 | $29,829 |
| Median household income | $28,438 | $54,570 | $55,322 |
| Median income owner occupied | $34,583 | $66,527 | $70,586 |
| Median income renter occupied | $0 | $30,828 | $35,192 |
| Median earnings male | $30,938 | $37,409 | $36,919 |
| Median earnings female | $14,063 | $25,115 | $26,250 |
| Unemployment rate | 0.0% | 3.1% | 4.7% |
| Poverty level | 29.2% | 12.3% | 15.1% |


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| Labour Type | Male | Female |
| Construction industry | 0.0% | 0.0% |
| Manufacturing sector | 61.5% | 61.5% |
| Financial & insurance services | 0.0% | 0.0% |
| Wholesale & retail services | 0.0% | 0.0% |
| Public administration | 0.0% | 0.0% |
| Transportation, warehousing & utilities | 0.0% | 0.0% |
| Education, health & social services | 0.0% | 0.0% |
| Other | 38.5% | 38.5% |
| City | Population | Household Income | National Avg. |
| Corydon, IA | 1,659 | $46,316 | 16.3% |
| Cincinnati, IA | 268 | $46,250 | 16.4% |
| Numa, IA | 79 | $40,000 | 27.7% |
| Mystic, IA | 317 | $38,750 | 30.0% |
| Allerton, IA | 453 | $38,102 | 31.1% |
| Promise City, IA | 72 | $28,438 | 48.6% |
| City | Population | Household Income | National Avg. |
| New Blaine, AR | 72 | $0 | 100.0% |
| Seba Dalkai, AZ | 72 | $50,833 | 8.1% |
| Mabie, CA | 72 | $0 | 100.0% |
| Smeltertown, CO | 72 | $0 | 100.0% |
| Ranger, GA | 72 | $25,313 | 54.2% |
| Promise City, IA | 72 | $28,438 | 48.6% |