| Index | Spencer | South Dakota | National |
| Income per capita | $30,792 | $27,516 | $29,829 |
| Median household income | $50,313 | $52,078 | $55,322 |
| Median income owner occupied | $56,250 | $66,299 | $70,586 |
| Median income renter occupied | $0 | $30,800 | $35,192 |
| Median earnings male | $55,000 | $35,140 | $36,919 |
| Median earnings female | $26,875 | $24,451 | $26,250 |
| Unemployment rate | 0.0% | 2.8% | 4.7% |
| Poverty level | 1.5% | 14.0% | 15.1% |
| Labour Type | Male | Female |
| Construction industry | 3.7% | 3.7% |
| Manufacturing sector | 33.3% | 33.3% |
| Financial & insurance services | 0.0% | 0.0% |
| Wholesale & retail services | 33.3% | 33.3% |
| Public administration | 0.0% | 0.0% |
| Transportation, warehousing & utilities | 14.8% | 14.8% |
| Education, health & social services | 0.0% | 0.0% |
| Other | 14.8% | 14.8% |
| City | Population | Household Income | National Avg. |
| Emery, SD | 510 | $61,250 | 10.7% |
| Salem, SD | 1,183 | $57,039 | 3.1% |
| Alexandria, SD | 766 | $52,500 | 5.1% |
| Bridgewater, SD | 322 | $50,625 | 8.5% |
| Canistota, SD | 663 | $49,643 | 10.3% |
| Spencer, SD | 132 | $50,313 | 9.1% |
| City | Population | Household Income | National Avg. |
| Yellow Bluff, AL | 132 | $9,506 | 82.8% |
| Vallecito, CA | 132 | $44,375 | 19.8% |
| Otter Creek, FL | 132 | $50,250 | 9.2% |
| Blockton, IA | 132 | $42,083 | 23.9% |
| Geneva, IA | 132 | $58,750 | 6.2% |
| Spencer, SD | 132 | $50,313 | 9.1% |
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