| Index | South Prairie | Washington | National |
| Income per capita | $53,099 | $48,431 | $44,883 |
| Median household income | $132,176 | $91,816 | $81,333 |
| Median income owner occupied | $135,241 | $120,601 | $106,172 |
| Median income renter occupied | $0 | $60,275 | $52,080 |
| Median earnings male | $86,003 | $60,502 | $54,343 |
| Median earnings female | $37,816 | $39,812 | $38,439 |
| Unemployment rate | 3.4% | 4.5% | 4.9% |
| Poverty level | 12.1% | 12.7% | 15.1% |

| Labour Type | Male | Female |
| Construction industry | 17.5% | 17.5% |
| Manufacturing sector | 25.0% | 25.0% |
| Financial & insurance services | 0.0% | 0.0% |
| Wholesale & retail services | 26.3% | 26.3% |
| Public administration | 3.8% | 3.8% |
| Transportation, warehousing & utilities | 6.3% | 6.3% |
| Education, health & social services | 3.8% | 3.8% |
| Other | 17.5% | 17.5% |
| City | Population | Household Income | National Avg. |
| Lake Holm, WA | 3,461 | $179,730 | 121.0% |
| Dash Point, WA | 1,045 | $174,406 | 114.4% |
| Lake Tapps, WA | 12,497 | $172,625 | 112.2% |
| Fife Heights, WA | 1,977 | $172,085 | 111.6% |
| Black Diamond, WA | 4,811 | $167,108 | 105.5% |
| South Prairie, WA | 309 | $132,176 | 62.5% |
| City | Population | Household Income | National Avg. |
| Cove, AR | 309 | $43,960 | 46.0% |
| Slaughter Beach, DE | 309 | $111,513 | 37.1% |
| Bagley, IA | 309 | $62,714 | 22.9% |
| Bronson, KS | 309 | $57,124 | 29.8% |
| Noble, LA | 309 | $50,452 | 38.0% |
| South Prairie, WA | 309 | $132,176 | 62.5% |