| Index | Foster | Missouri | National |
| Income per capita | $43,418 | $39,715 | $44,883 |
| Median household income | $70,230 | $72,613 | $81,333 |
| Median income owner occupied | $98,628 | $90,986 | $106,172 |
| Median income renter occupied | $0 | $45,210 | $52,080 |
| Median earnings male | $88,231 | $52,324 | $54,343 |
| Median earnings female | $0 | $36,971 | $38,439 |
| Unemployment rate | 0.0% | 4.4% | 4.9% |
| Poverty level | 0.0% | 15.3% | 15.1% |

| 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 | 314 | $97,730 | 20.2% |
| Linn Valley, KS | 895 | $83,510 | 2.7% |
| Amoret, MO | 159 | $82,621 | 1.6% |
| Fulton, KS | 112 | $68,534 | 15.7% |
| Passaic, MO | 44 | $65,570 | 19.4% |
| Foster, MO | 75 | $70,230 | 13.7% |
| City | Population | Household Income | National Avg. |
| Willow Creek, AK | 75 | $0 | 100.0% |
| Lindcove, CA | 75 | $0 | 100.0% |
| Paoli, CO | 75 | $0 | 100.0% |
| Promise City, IA | 75 | $41,538 | 48.9% |
| Comstock, MN | 75 | $0 | 100.0% |
| Foster, MO | 75 | $70,230 | 13.7% |