| Index | Williamstown | New Jersey | National |
| Income per capita | $58,180 | $55,297 | $44,883 |
| Median household income | $125,545 | $108,915 | $81,333 |
| Median income owner occupied | $149,317 | $143,334 | $106,172 |
| Median income renter occupied | $45,281 | $61,880 | $52,080 |
| Median earnings male | $94,672 | $69,742 | $54,343 |
| Median earnings female | $61,739 | $46,406 | $38,439 |
| Unemployment rate | 1.5% | 5.4% | 4.9% |
| Poverty level | 4.5% | 10.9% | 15.1% |


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| Labour Type | Male | Female |
| Construction industry | 14.8% | 14.8% |
| Manufacturing sector | 4.6% | 4.6% |
| Financial & insurance services | 3.1% | 3.1% |
| Wholesale & retail services | 23.2% | 23.2% |
| Public administration | 11.7% | 11.7% |
| Transportation, warehousing & utilities | 11.7% | 11.7% |
| Education, health & social services | 11.7% | 11.7% |
| Other | 17.9% | 17.9% |
| City | Population | Household Income | National Avg. |
| Pine Valley, NJ | 11 | $325,363 | 300.0% |
| Richwood, NJ | 4,103 | $249,063 | 206.2% |
| Haddonfield, NJ | 11,585 | $229,576 | 182.3% |
| Springdale, NJ | 14,396 | $226,530 | 178.5% |
| Barclay, NJ | 4,138 | $219,489 | 169.9% |
| Williamstown, NJ | 14,480 | $125,545 | 54.4% |
| City | Population | Household Income | National Avg. |
| Forrest City, AR | 14,474 | $50,238 | 38.2% |
| Broadlands, VA | 14,486 | $293,477 | 260.8% |
| New Franklin, OH | 14,489 | $112,990 | 38.9% |
| Kings Park West, VA | 14,489 | $213,849 | 162.9% |
| Artondale, WA | 14,469 | $191,556 | 135.5% |
| Williamstown, NJ | 14,480 | $125,545 | 54.4% |