| Index | Holtsville | New York | National |
| Income per capita | $67,242 | $51,391 | $44,883 |
| Median household income | $163,324 | $89,985 | $81,333 |
| Median income owner occupied | $182,911 | $125,982 | $106,172 |
| Median income renter occupied | $104,184 | $58,659 | $52,080 |
| Median earnings male | $93,746 | $59,465 | $54,343 |
| Median earnings female | $55,812 | $44,739 | $38,439 |
| Unemployment rate | 2.5% | 5.0% | 4.9% |
| Poverty level | 4.6% | 15.5% | 15.1% |

| 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 | 949 | $377,288 | 363.9% |
| Head of the Harbor, NY | 1,506 | $323,823 | 298.1% |
| Belle Terre, NY | 813 | $304,762 | 274.7% |
| Poquott, NY | 1,135 | $271,972 | 234.4% |
| Fort Salonga, NY | 10,194 | $234,982 | 188.9% |
| Holtsville, NY | 19,035 | $163,324 | 100.8% |
| City | Population | Household Income | National Avg. |
| Springboro, OH | 19,037 | $158,164 | 94.5% |
| Thomasville, GA | 19,040 | $57,733 | 29.0% |
| Niles, OH | 19,041 | $66,918 | 17.7% |
| Mayfield Heights, OH | 19,024 | $84,864 | 4.3% |
| Port Alberni, BC | 19,018 | n/a | |
| Holtsville, NY | 19,035 | $163,324 | 100.8% |