| Index | Duncan | South Carolina | National |
| Income per capita | $30,277 | $37,827 | $44,883 |
| Median household income | $73,434 | $68,647 | $81,333 |
| Median income owner occupied | $73,415 | $87,094 | $106,172 |
| Median income renter occupied | $74,951 | $44,371 | $52,080 |
| Median earnings male | $53,272 | $46,426 | $54,343 |
| Median earnings female | $43,538 | $34,595 | $38,439 |
| Unemployment rate | 4.0% | 5.3% | 4.9% |
| Poverty level | 21.8% | 17.2% | 15.1% |

| 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 | 20,122 | $165,408 | 103.4% |
| Reidville, SC | 1,358 | $147,992 | 82.0% |
| Simpsonville, SC | 23,729 | $110,851 | 36.3% |
| Campobello, SC | 683 | $104,778 | 28.8% |
| Mauldin, SC | 26,699 | $101,335 | 24.6% |
| Duncan, SC | 3,627 | $73,434 | 9.7% |
| City | Population | Household Income | National Avg. |
| Mission Hills, CA | 3,627 | $128,336 | 57.8% |
| Bridgeville, DE | 3,626 | $71,463 | 12.1% |
| Princess Anne, MD | 3,628 | $51,574 | 36.6% |
| Naples, UT | 3,628 | $119,651 | 47.1% |
| Campo, CA | 3,625 | $73,823 | 9.2% |
| Duncan, SC | 3,627 | $73,434 | 9.7% |