| Index | Mercer Island | Washington | National |
| Income per capita | $142,617 | $48,431 | $44,883 |
| Median household income | $227,166 | $91,816 | $81,333 |
| Median income owner occupied | $324,121 | $120,601 | $106,172 |
| Median income renter occupied | $123,934 | $60,275 | $52,080 |
| Median earnings male | $153,511 | $60,502 | $54,343 |
| Median earnings female | $85,988 | $39,812 | $38,439 |
| Unemployment rate | 1.5% | 4.5% | 4.9% |
| Poverty level | 5.3% | 12.7% | 15.1% |

| Labour Type | Male | Female |
| Construction industry | 3.7% | 3.7% |
| Manufacturing sector | 7.4% | 7.4% |
| Financial & insurance services | 5.9% | 5.9% |
| Wholesale & retail services | 16.4% | 16.4% |
| Public administration | 2.0% | 2.0% |
| Transportation, warehousing & utilities | 2.3% | 2.3% |
| Education, health & social services | 15.1% | 15.1% |
| Other | 40.8% | 40.8% |
| City | Population | Household Income | National Avg. |
| Hunts Point, WA | 354 | $375,086 | 361.2% |
| Clyde Hill, WA | 3,430 | $373,193 | 358.8% |
| Yarrow Point, WA | 1,395 | $367,498 | 351.8% |
| Beaux Arts Village, WA | 408 | $362,576 | 345.8% |
| Medina, WA | 3,360 | $276,317 | 239.7% |
| Mercer Island, WA | 26,374 | $227,166 | 179.3% |
| City | Population | Household Income | National Avg. |
| Lockport, IL | 26,386 | $129,733 | 59.5% |
| Keystone, FL | 26,359 | $186,631 | 129.5% |
| Fairland, MD | 26,400 | $124,614 | 53.2% |
| Socastee, SC | 26,401 | $70,959 | 12.8% |
| Reedley, CA | 26,417 | $67,504 | 17.0% |
| Mercer Island, WA | 26,374 | $227,166 | 179.3% |