| Index | Foster | Missouri | National |
| Income per capita | $28,804 | $27,044 | $29,829 |
| Median household income | $46,250 | $49,593 | $55,322 |
| Median income owner occupied | $65,000 | $62,242 | $70,586 |
| Median income renter occupied | $0 | $30,016 | $35,192 |
| Median earnings male | $60,625 | $34,901 | $36,919 |
| Median earnings female | $0 | $24,771 | $26,250 |
| Unemployment rate | 0.0% | 4.1% | 4.7% |
| Poverty level | 0.0% | 15.3% | 15.1% |


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| Labour Type | Male | Female |
| Construction industry | 30.0% | 30.0% |
| Manufacturing sector | 5.0% | 5.0% |
| 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 | 65.0% | 65.0% |
| City | Population | Household Income | National Avg. |
| Hume, MO | 308 | $66,250 | 19.8% |
| Linn Valley, KS | 861 | $55,938 | 1.1% |
| Amoret, MO | 153 | $55,417 | 0.2% |
| Fulton, KS | 110 | $46,250 | 16.4% |
| Passaic, MO | 42 | $44,375 | 19.8% |
| Foster, MO | 74 | $46,250 | 16.4% |
| City | Population | Household Income | National Avg. |
| Port Alexander, AK | 74 | $49,688 | 10.2% |
| Willow Creek, AK | 74 | $0 | 100.0% |
| Woodruff, AZ | 74 | $0 | 100.0% |
| Hornitos, CA | 74 | $0 | 100.0% |
| Oakville, CA | 74 | $0 | 100.0% |
| Foster, MO | 74 | $46,250 | 16.4% |