| Index | Oldham | South Dakota | National |
| Income per capita | $51,622 | $41,166 | $44,883 |
| Median household income | $66,447 | $77,914 | $81,333 |
| Median income owner occupied | $86,780 | $100,475 | $106,172 |
| Median income renter occupied | $8,662 | $45,187 | $52,080 |
| Median earnings male | $67,192 | $52,540 | $54,343 |
| Median earnings female | $32,951 | $36,073 | $38,439 |
| Unemployment rate | 0.0% | 2.9% | 4.9% |
| Poverty level | 16.0% | 14.0% | 15.1% |

| Labour Type | Male | Female |
| Construction industry | 2.0% | 2.0% |
| Manufacturing sector | 26.5% | 26.5% |
| Financial & insurance services | 0.0% | 0.0% |
| Wholesale & retail services | 18.4% | 18.4% |
| Public administration | 0.0% | 0.0% |
| Transportation, warehousing & utilities | 34.7% | 34.7% |
| Education, health & social services | 18.4% | 18.4% |
| Other | 0.0% | 0.0% |
| City | Population | Household Income | National Avg. |
| De Smet, SD | 1,071 | $94,179 | 15.8% |
| Ramona, SD | 426 | $82,717 | 1.7% |
| Arlington, SD | 1,035 | $82,574 | 1.5% |
| Lake Preston, SD | 461 | $77,705 | 4.5% |
| Howard, SD | 775 | $64,710 | 20.4% |
| Oldham, SD | 135 | $66,447 | 18.3% |
| City | Population | Household Income | National Avg. |
| Nauvoo, AL | 135 | $50,315 | 38.1% |
| Yellow Bluff, AL | 135 | $13,900 | 82.9% |
| Otter Creek, FL | 135 | $74,687 | 8.2% |
| Nemaha, IA | 135 | $0 | 100.0% |
| Yale, IL | 135 | $60,816 | 25.2% |
| Oldham, SD | 135 | $66,447 | 18.3% |