| Index | South Plainfield | New Jersey | National |
| Income per capita | $40,875 | $37,538 | $29,829 |
| Median household income | $108,244 | $73,702 | $55,322 |
| Median income owner occupied | $119,035 | $97,281 | $70,586 |
| Median income renter occupied | $85,375 | $42,169 | $35,192 |
| Median earnings male | $57,171 | $47,369 | $36,919 |
| Median earnings female | $41,708 | $32,116 | $26,250 |
| Unemployment rate | 4.1% | 5.2% | 4.7% |
| Poverty level | 3.1% | 10.9% | 15.1% |


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| Labour Type | Male | Female |
| Construction industry | 8.3% | 8.3% |
| Manufacturing sector | 13.5% | 13.5% |
| Financial & insurance services | 4.7% | 4.7% |
| Wholesale & retail services | 15.8% | 15.8% |
| Public administration | 10.5% | 10.5% |
| Transportation, warehousing & utilities | 9.4% | 9.4% |
| Education, health & social services | 10.2% | 10.2% |
| Other | 24.8% | 24.8% |
| City | Population | Household Income | National Avg. |
| Short Hills, NJ | 13,700 | $250,001 | 351.9% |
| Harlingen, NJ | 481 | $240,682 | 335.1% |
| Blawenburg, NJ | 99 | $219,688 | 297.1% |
| Pleasant Plains, NJ | 627 | $211,547 | 282.4% |
| Blackwells Mills, NJ | 9,509 | $204,018 | 268.8% |
| South Plainfield, NJ | 23,961 | $108,244 | 95.7% |
| City | Population | Household Income | National Avg. |
| Port St. John, FL | 23,940 | $66,948 | 21.0% |
| Ponca City, OK | 23,940 | $44,281 | 20.0% |
| Auburn Hills, MI | 23,984 | $68,780 | 24.3% |
| Kalispell, MT | 23,935 | $47,750 | 13.7% |
| Freeport, IL | 23,930 | $39,787 | 28.1% |
| South Plainfield, NJ | 23,961 | $108,244 | 95.7% |