| Index | Duncan | South Carolina | National |
| Income per capita | $20,019 | $25,521 | $29,829 |
| Median household income | $50,000 | $46,898 | $55,322 |
| Median income owner occupied | $50,208 | $57,389 | $70,586 |
| Median income renter occupied | $49,792 | $29,505 | $35,192 |
| Median earnings male | $36,318 | $32,196 | $36,919 |
| Median earnings female | $30,104 | $23,580 | $26,250 |
| Unemployment rate | 3.8% | 5.0% | 4.7% |
| Poverty level | 21.8% | 17.2% | 15.1% |


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| Labour Type | Male | Female |
| Construction industry | 6.4% | 6.4% |
| Manufacturing sector | 24.8% | 24.8% |
| Financial & insurance services | 0.9% | 0.9% |
| Wholesale & retail services | 18.1% | 18.1% |
| Public administration | 3.3% | 3.3% |
| Transportation, warehousing & utilities | 5.2% | 5.2% |
| Education, health & social services | 4.3% | 4.3% |
| Other | 37.0% | 37.0% |
| City | Population | Household Income | National Avg. |
| Five Forks, SC | 19,399 | $112,146 | 102.7% |
| Reidville, SC | 1,317 | $99,219 | 79.3% |
| Simpsonville, SC | 23,200 | $75,535 | 36.5% |
| Campobello, SC | 665 | $69,375 | 25.4% |
| Mauldin, SC | 25,829 | $67,902 | 22.7% |
| Duncan, SC | 3,556 | $50,000 | 9.6% |
| City | Population | Household Income | National Avg. |
| Sainte-Anne-des-Lacs, QC | 3,556 | n/a | |
| Kamloops 1, BC | 3,556 | n/a | |
| Blind River, ON | 3,555 | n/a | |
| Loxahatchee Groves, FL | 3,557 | $102,292 | 84.9% |
| Unadilla, GA | 3,557 | $38,700 | 30.0% |
| Duncan, SC | 3,556 | $50,000 | 9.6% |