| Index | Middle Island | New York | National |
| Income per capita | $36,817 | $34,212 | $29,829 |
| Median household income | $75,545 | $60,741 | $55,322 |
| Median income owner occupied | $95,559 | $83,277 | $70,586 |
| Median income renter occupied | $40,729 | $38,983 | $35,192 |
| Median earnings male | $58,824 | $40,464 | $36,919 |
| Median earnings female | $41,814 | $30,906 | $26,250 |
| Unemployment rate | 2.5% | 4.8% | 4.7% |
| Poverty level | 8.2% | 15.5% | 15.1% |


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| Labour Type | Male | Female |
| Construction industry | 13.5% | 13.5% |
| Manufacturing sector | 10.9% | 10.9% |
| Financial & insurance services | 1.5% | 1.5% |
| Wholesale & retail services | 19.6% | 19.6% |
| Public administration | 4.8% | 4.8% |
| Transportation, warehousing & utilities | 11.4% | 11.4% |
| Education, health & social services | 14.8% | 14.8% |
| Other | 19.6% | 19.6% |
| 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% |
| West Hampton Dunes, NY | 69 | $155,000 | 180.2% |
| Middle Island, NY | 11,030 | $75,545 | 36.6% |
| City | Population | Household Income | National Avg. |
| Ontario, OR | 11,031 | $35,917 | 35.1% |
| Spencer, IA | 11,038 | $45,224 | 18.3% |
| Doctor Phillips, FL | 11,020 | $99,716 | 80.2% |
| New Baltimore, VA | 11,017 | $145,586 | 163.2% |
| Notre-Dame-de-l'Île-Perrot, QC | 11,017 | n/a | |
| Middle Island, NY | 11,030 | $75,545 | 36.6% |