| Index | Northfield | New Jersey | National |
| Income per capita | $62,652 | $55,297 | $44,883 |
| Median household income | $125,048 | $108,915 | $81,333 |
| Median income owner occupied | $138,239 | $143,334 | $106,172 |
| Median income renter occupied | $55,061 | $61,880 | $52,080 |
| Median earnings male | $73,079 | $69,742 | $54,343 |
| Median earnings female | $52,873 | $46,406 | $38,439 |
| Unemployment rate | 4.3% | 5.4% | 4.9% |
| Poverty level | 4.0% | 10.9% | 15.1% |


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| Labour Type | Male | Female |
| Construction industry | 6.4% | 6.4% |
| Manufacturing sector | 3.9% | 3.9% |
| Financial & insurance services | 3.3% | 3.3% |
| Wholesale & retail services | 13.1% | 13.1% |
| Public administration | 5.7% | 5.7% |
| Transportation, warehousing & utilities | 6.2% | 6.2% |
| Education, health & social services | 12.1% | 12.1% |
| Other | 47.6% | 47.6% |
| City | Population | Household Income | National Avg. |
| Barclay, NJ | 4,138 | $219,489 | 169.9% |
| Port Republic, NJ | 1,161 | $211,338 | 159.8% |
| Linwood, NJ | 6,935 | $170,259 | 109.3% |
| Longport, NJ | 834 | $163,658 | 101.2% |
| Margate City, NJ | 6,048 | $151,385 | 86.1% |
| Northfield, NJ | 8,410 | $125,048 | 53.7% |
| City | Population | Household Income | National Avg. |
| Carl Junction, MO | 8,409 | $89,607 | 10.2% |
| Stayton, OR | 8,409 | $96,624 | 18.8% |
| Bryans Road, MD | 8,407 | $137,296 | 68.8% |
| Topanga, CA | 8,406 | $177,914 | 118.7% |
| Cleveland, TX | 8,406 | $62,310 | 23.4% |
| Northfield, NJ | 8,410 | $125,048 | 53.7% |