| Index | Clark | South Dakota | National |
| Income per capita | $28,758 | $27,516 | $29,829 |
| Median household income | $40,219 | $52,078 | $55,322 |
| Median income owner occupied | $44,219 | $66,299 | $70,586 |
| Median income renter occupied | $28,929 | $30,800 | $35,192 |
| Median earnings male | $31,450 | $35,140 | $36,919 |
| Median earnings female | $19,682 | $24,451 | $26,250 |
| Unemployment rate | 2.4% | 2.8% | 4.7% |
| Poverty level | 9.4% | 14.0% | 15.1% |


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| Labour Type | Male | Female |
| Construction industry | 16.4% | 16.4% |
| Manufacturing sector | 12.2% | 12.2% |
| Financial & insurance services | 4.3% | 4.3% |
| Wholesale & retail services | 12.8% | 12.8% |
| Public administration | 3.3% | 3.3% |
| Transportation, warehousing & utilities | 8.6% | 8.6% |
| Education, health & social services | 4.9% | 4.9% |
| Other | 37.5% | 37.5% |
| City | Population | Household Income | National Avg. |
| Naples, SD | 44 | $121,875 | 120.3% |
| Wallace, SD | 69 | $61,250 | 10.7% |
| Garden City, SD | 93 | $51,875 | 6.2% |
| Bradley, SD | 68 | $48,750 | 11.9% |
| Raymond, SD | 31 | $47,500 | 14.1% |
| Clark, SD | 1,233 | $40,219 | 27.3% |
| City | Population | Household Income | National Avg. |
| Pirtleville, AZ | 1,233 | $40,227 | 27.3% |
| Tahoe Vista, CA | 1,233 | $77,159 | 39.5% |
| Redington Beach, FL | 1,233 | $86,250 | 55.9% |
| Mitchell, IL | 1,233 | $62,941 | 13.8% |
| Greenup, KY | 1,233 | $47,500 | 14.1% |
| Clark, SD | 1,233 | $40,219 | 27.3% |