| Index | Markham | Washington | National |
| Income per capita | $45,387 | $48,431 | $44,883 |
| Median household income | $0 | $91,816 | $81,333 |
| Median income owner occupied | $0 | $120,601 | $106,172 |
| Median income renter occupied | $0 | $60,275 | $52,080 |
| Median earnings male | $0 | $60,502 | $54,343 |
| Median earnings female | $0 | $39,812 | $38,439 |
| Unemployment rate | 0.0% | 4.5% | 4.9% |
| Poverty level | 0.0% | 12.7% | 15.1% |

| Labour Type | Male | Female |
| Construction industry | 0.0% | 0.0% |
| Manufacturing sector | 0.0% | 0.0% |
| Financial & insurance services | 0.0% | 0.0% |
| Wholesale & retail services | 57.1% | 57.1% |
| Public administration | 0.0% | 0.0% |
| Transportation, warehousing & utilities | 0.0% | 0.0% |
| Education, health & social services | 0.0% | 0.0% |
| Other | 42.9% | 42.9% |
| City | Population | Household Income | National Avg. |
| Aberdeen Gardens, WA | 312 | $142,246 | 74.9% |
| Central Park, WA | 3,527 | $119,771 | 47.3% |
| Ocean City, WA | 160 | $110,489 | 35.8% |
| Cohassett Beach, WA | 536 | $102,279 | 25.8% |
| Cosmopolis, WA | 2,014 | $88,653 | 9.0% |
| Markham, WA | 81 | $0 | 100.0% |
| City | Population | Household Income | National Avg. |
| Hope, AK | 81 | $3,675 | 95.5% |
| Daisy, AR | 81 | $58,641 | 27.9% |
| Horseshoe Beach, FL | 81 | $56,888 | 30.1% |
| Numa, IA | 81 | $58,587 | 28.0% |
| Old Ripley, IL | 81 | $103,068 | 26.7% |
| Markham, WA | 81 | $0 | 100.0% |