| Index | Plum Branch | South Carolina | National |
| Income per capita | $42,717 | $25,521 | $29,829 |
| Median household income | $118,250 | $46,898 | $55,322 |
| Median income owner occupied | $118,500 | $57,389 | $70,586 |
| Median income renter occupied | $0 | $29,505 | $35,192 |
| Median earnings male | $75,694 | $32,196 | $36,919 |
| Median earnings female | $0 | $23,580 | $26,250 |
| Unemployment rate | 0.0% | 5.0% | 4.7% |
| Poverty level | 8.7% | 17.2% | 15.1% |


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| Labour Type | Male | Female |
| Construction industry | 25.8% | 25.8% |
| Manufacturing sector | 3.2% | 3.2% |
| Financial & insurance services | 0.0% | 0.0% |
| Wholesale & retail services | 0.0% | 0.0% |
| Public administration | 0.0% | 0.0% |
| Transportation, warehousing & utilities | 16.1% | 16.1% |
| Education, health & social services | 6.5% | 6.5% |
| Other | 48.4% | 48.4% |
| City | Population | Household Income | National Avg. |
| Modoc, SC | 366 | $125,776 | 127.4% |
| Parksville, SC | 135 | $45,357 | 18.0% |
| Troy, SC | 145 | $39,125 | 29.3% |
| Bradley, SC | 127 | $38,650 | 30.1% |
| McCormick, SC | 3,043 | $37,841 | 31.6% |
| Plum Branch, SC | 92 | $118,250 | 113.7% |
| City | Population | Household Income | National Avg. |
| Rock House, AZ | 92 | $33,235 | 39.9% |
| Big Lagoon, CA | 92 | $45,735 | 17.3% |
| Ricketts, IA | 92 | $25,833 | 53.3% |
| Bishop Hill, IL | 92 | $0 | 100.0% |
| Mount Auburn, IN | 92 | $58,125 | 5.1% |
| Plum Branch, SC | 92 | $118,250 | 113.7% |