| Index | Holtsville | New York | National |
| Income per capita | $44,585 | $34,212 | $29,829 |
| Median household income | $109,701 | $60,741 | $55,322 |
| Median income owner occupied | $123,879 | $83,277 | $70,586 |
| Median income renter occupied | $71,250 | $38,983 | $35,192 |
| Median earnings male | $63,551 | $40,464 | $36,919 |
| Median earnings female | $38,585 | $30,906 | $26,250 |
| Unemployment rate | 2.4% | 4.8% | 4.7% |
| Poverty level | 4.6% | 15.5% | 15.1% |


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| Labour Type | Male | Female |
| Construction industry | 17.3% | 17.3% |
| Manufacturing sector | 7.8% | 7.8% |
| Financial & insurance services | 5.1% | 5.1% |
| Wholesale & retail services | 15.1% | 15.1% |
| Public administration | 6.7% | 6.7% |
| Transportation, warehousing & utilities | 9.3% | 9.3% |
| Education, health & social services | 15.0% | 15.0% |
| Other | 21.6% | 21.6% |
| City | Population | Household Income | National Avg. |
| Old Field, NY | 915 | $250,000 | 351.9% |
| Head of the Harbor, NY | 1,454 | $215,833 | 290.1% |
| Belle Terre, NY | 791 | $204,167 | 269.1% |
| Poquott, NY | 1,092 | $181,750 | 228.5% |
| Fort Salonga, NY | 9,930 | $159,700 | 188.7% |
| Holtsville, NY | 18,574 | $109,701 | 98.3% |
| City | Population | Household Income | National Avg. |
| Central Saanich, BC | 18,572 | n/a | |
| East Massapequa, NY | 18,564 | $112,230 | 102.9% |
| Mayfield Heights, OH | 18,586 | $55,901 | 1.0% |
| Winthrop Town, MA | 18,558 | $76,996 | 39.2% |
| Lake Ronkonkoma, NY | 18,555 | $91,529 | 65.4% |
| Holtsville, NY | 18,574 | $109,701 | 98.3% |