| Index | Williamstown | New Jersey | National |
| Income per capita | $39,162 | $37,538 | $29,829 |
| Median household income | $83,945 | $73,702 | $55,322 |
| Median income owner occupied | $99,092 | $97,281 | $70,586 |
| Median income renter occupied | $30,217 | $42,169 | $35,192 |
| Median earnings male | $64,496 | $47,369 | $36,919 |
| Median earnings female | $42,190 | $32,116 | $26,250 |
| Unemployment rate | 1.4% | 5.2% | 4.7% |
| 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 | $214,583 | 287.9% |
| Richwood, NJ | 3,967 | $169,773 | 206.9% |
| Springdale, NJ | 14,111 | $153,178 | 176.9% |
| Haddonfield, NJ | 11,342 | $151,579 | 174.0% |
| Barclay, NJ | 4,044 | $145,588 | 163.2% |
| Williamstown, NJ | 14,161 | $83,945 | 51.7% |
| City | Population | Household Income | National Avg. |
| Greendale, WI | 14,160 | $74,661 | 35.0% |
| Anna, TX | 14,159 | $89,829 | 62.4% |
| Weigelstown, PA | 14,156 | $56,708 | 2.5% |
| Washington Court House, OH | 14,155 | $43,758 | 20.9% |
| Hockessin, DE | 14,172 | $153,879 | 178.2% |
| Williamstown, NJ | 14,161 | $83,945 | 51.7% |
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