| Index | Sinai | South Dakota | National |
| Income per capita | $32,043 | $41,166 | $44,883 |
| Median household income | $55,517 | $77,914 | $81,333 |
| Median income owner occupied | $54,749 | $100,475 | $106,172 |
| Median income renter occupied | $0 | $45,187 | $52,080 |
| Median earnings male | $53,749 | $52,540 | $54,343 |
| Median earnings female | $46,414 | $36,073 | $38,439 |
| Unemployment rate | 0.0% | 2.9% | 4.9% |
| Poverty level | 4.2% | 14.0% | 15.1% |

| Labour Type | Male | Female |
| Construction industry | 8.7% | 8.7% |
| Manufacturing sector | 58.7% | 58.7% |
| Financial & insurance services | 0.0% | 0.0% |
| Wholesale & retail services | 0.0% | 0.0% |
| Public administration | 4.3% | 4.3% |
| Transportation, warehousing & utilities | 0.0% | 0.0% |
| Education, health & social services | 0.0% | 0.0% |
| Other | 28.3% | 28.3% |
| City | Population | Household Income | National Avg. |
| Ramona, SD | 426 | $82,717 | 1.7% |
| Arlington, SD | 1,035 | $82,574 | 1.5% |
| Volga, SD | 1,990 | $82,223 | 1.1% |
| Bruce, SD | 264 | $81,173 | 0.2% |
| Brookings, SD | 25,380 | $78,859 | 3.0% |
| Sinai, SD | 172 | $55,517 | 31.7% |
| City | Population | Household Income | National Avg. |
| Elgin, AZ | 172 | $75,100 | 7.7% |
| Vernon, AZ | 172 | $0 | 100.0% |
| Sierraville, CA | 172 | $0 | 100.0% |
| Sisquoc, CA | 172 | $76,232 | 6.3% |
| Castalia, IA | 172 | $65,827 | 19.1% |
| Sinai, SD | 172 | $55,517 | 31.7% |