| Index | Southold | New York | National |
| Income per capita | $78,898 | $51,391 | $44,883 |
| Median household income | $129,112 | $89,985 | $81,333 |
| Median income owner occupied | $128,485 | $125,982 | $106,172 |
| Median income renter occupied | $0 | $58,659 | $52,080 |
| Median earnings male | $76,567 | $59,465 | $54,343 |
| Median earnings female | $72,695 | $44,739 | $38,439 |
| Unemployment rate | 2.1% | 5.0% | 4.9% |
| Poverty level | 7.7% | 15.5% | 15.1% |

| Labour Type | Male | Female |
| Construction industry | 12.6% | 12.6% |
| Manufacturing sector | 2.2% | 2.2% |
| Financial & insurance services | 4.4% | 4.4% |
| Wholesale & retail services | 22.1% | 22.1% |
| Public administration | 15.6% | 15.6% |
| Transportation, warehousing & utilities | 2.6% | 2.6% |
| Education, health & social services | 8.5% | 8.5% |
| Other | 28.7% | 28.7% |
| City | Population | Household Income | National Avg. |
| Water Mill, NY | 1,911 | $257,703 | 216.8% |
| Northwest Harbor, NY | 4,302 | $244,151 | 200.2% |
| Wainscott, NY | 349 | $224,428 | 175.9% |
| North Haven, NY | 884 | $212,458 | 161.2% |
| Shinnecock Hills, NY | 1,630 | $206,492 | 153.9% |
| Southold, NY | 6,075 | $129,112 | 58.7% |
| City | Population | Household Income | National Avg. |
| Sainte-Martine, QC | 6,075 | n/a | |
| Morris Plains, NJ | 6,076 | $186,387 | 129.2% |
| Littlefield, TX | 6,076 | $60,437 | 25.7% |
| Kingston, TN | 6,077 | $71,000 | 12.7% |
| Hidden Valley Lake, CA | 6,072 | $101,438 | 24.7% |
| Southold, NY | 6,075 | $129,112 | 58.7% |