| Index | Twain | California | National |
| Income per capita | $13,228 | $31,458 | $29,829 |
| Median household income | $0 | $63,783 | $55,322 |
| Median income owner occupied | $0 | $86,568 | $70,586 |
| Median income renter occupied | $48,125 | $43,419 | $35,192 |
| Median earnings male | $0 | $36,599 | $36,919 |
| Median earnings female | $0 | $27,020 | $26,250 |
| Unemployment rate | 14.8% | 5.5% | 4.7% |
| Poverty level | 53.1% | 15.8% | 15.1% |
| Labour Type | Male | Female |
| Construction industry | n/a | n/a |
| Manufacturing sector | n/a | n/a |
| Financial & insurance services | n/a | n/a |
| Wholesale & retail services | n/a | n/a |
| Public administration | n/a | n/a |
| Transportation, warehousing & utilities | n/a | n/a |
| Education, health & social services | n/a | n/a |
| Other | n/a | n/a |
| City | Population | Household Income | National Avg. |
| Lake Almanor West, CA | 329 | $155,000 | 180.2% |
| Keddie, CA | 68 | $110,000 | 98.8% |
| Meadow Valley, CA | 478 | $100,192 | 81.1% |
| East Shore, CA | 139 | $95,658 | 72.9% |
| East Quincy, CA | 2,279 | $61,667 | 11.5% |
| Twain, CA | 303 | $0 | 100.0% |
| City | Population | Household Income | National Avg. |
| Surrency, GA | 303 | $28,269 | 48.9% |
| Bagley, IA | 303 | $41,458 | 25.1% |
| Bush, IL | 303 | $67,639 | 22.3% |
| Opdyke, IL | 303 | $63,750 | 15.2% |
| Noble, LA | 303 | $33,289 | 39.8% |
| Twain, CA | 303 | $0 | 100.0% |
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