| Index | Twin Brooks | South Dakota | National |
| Income per capita | $28,873 | $27,516 | $29,829 |
| Median household income | $53,750 | $52,078 | $55,322 |
| Median income owner occupied | $51,875 | $66,299 | $70,586 |
| Median income renter occupied | $0 | $30,800 | $35,192 |
| Median earnings male | $40,625 | $35,140 | $36,919 |
| Median earnings female | $0 | $24,451 | $26,250 |
| Unemployment rate | 0.0% | 2.8% | 4.7% |
| Poverty level | 2.3% | 14.0% | 15.1% |


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| Labour Type | Male | Female |
| Construction industry | 0.0% | 0.0% |
| Manufacturing sector | 40.0% | 40.0% |
| Financial & insurance services | 13.3% | 13.3% |
| Wholesale & retail services | 6.7% | 6.7% |
| Public administration | 20.0% | 20.0% |
| Transportation, warehousing & utilities | 0.0% | 0.0% |
| Education, health & social services | 0.0% | 0.0% |
| Other | 20.0% | 20.0% |
| City | Population | Household Income | National Avg. |
| Corona, SD | 44 | $65,714 | 18.8% |
| La Bolt, SD | 99 | $59,167 | 7.0% |
| Milbank, SD | 3,137 | $58,476 | 5.7% |
| Stockholm, SD | 132 | $52,500 | 5.1% |
| Marvin, SD | 18 | $51,250 | 7.4% |
| Twin Brooks, SD | 44 | $53,750 | 2.8% |
| City | Population | Household Income | National Avg. |
| Ocotillo, CA | 44 | $0 | 100.0% |
| Whitley Gardens, CA | 44 | $0 | 100.0% |
| Crestone, CO | 44 | $0 | 100.0% |
| Lynn, CO | 44 | $0 | 100.0% |
| Fenwick, CT | 44 | $113,750 | 105.6% |
| Twin Brooks, SD | 44 | $53,750 | 2.8% |