| Index | Central Islip | New York | National |
| Income per capita | $44,388 | $51,391 | $44,883 |
| Median household income | $118,982 | $89,985 | $81,333 |
| Median income owner occupied | $140,902 | $125,982 | $106,172 |
| Median income renter occupied | $68,447 | $58,659 | $52,080 |
| Median earnings male | $50,746 | $59,465 | $54,343 |
| Median earnings female | $45,486 | $44,739 | $38,439 |
| Unemployment rate | 2.7% | 5.0% | 4.9% |
| Poverty level | 9.4% | 15.5% | 15.1% |

| Labour Type | Male | Female |
| Construction industry | 12.9% | 12.9% |
| Manufacturing sector | 10.9% | 10.9% |
| Financial & insurance services | 0.9% | 0.9% |
| Wholesale & retail services | 15.7% | 15.7% |
| Public administration | 5.2% | 5.2% |
| Transportation, warehousing & utilities | 8.1% | 8.1% |
| Education, health & social services | 13.7% | 13.7% |
| Other | 30.6% | 30.6% |
| City | Population | Household Income | National Avg. |
| Laurel Hollow, NY | 2,019 | $379,136 | 366.2% |
| Old Field, NY | 949 | $377,288 | 363.9% |
| Cold Spring Harbor, NY | 2,967 | $371,740 | 357.1% |
| Huntington Bay, NY | 1,646 | $365,621 | 349.5% |
| Head of the Harbor, NY | 1,506 | $323,823 | 298.1% |
| Central Islip, NY | 34,526 | $118,982 | 46.3% |
| City | Population | Household Income | National Avg. |
| Dalton, GA | 34,537 | $71,062 | 12.6% |
| DeLand, FL | 34,541 | $82,369 | 1.3% |
| Kearney, NE | 34,543 | $92,300 | 13.5% |
| Franklin Town, MA | 34,557 | $178,186 | 119.1% |
| Alabaster, AL | 34,559 | $120,841 | 48.6% |
| Central Islip, NY | 34,526 | $118,982 | 46.3% |