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> Washington > Zip Code 98531
| Zip Code : | 98531 |
| City : | Centralia city, Fords Prairie, Grand Mound |
| County : | Lewis County, Thurston County |
| State : | Washington (WA) |
| Land Area : | 136.63 sq mi |
| Water Area : | 1.39 sq mi |
| Latitude : | 46.7304368 |
| Longitude : | -122.9027743 |
| Population (2010): | 24,121 |
| Population Estimate (2012) : | 23,486 |
| Population Density : | 176.54/sq mi |
| Housing Units (2012) : | 10,301 |
| Median Household Income (2012) : | $37,491 (Washington : $59,374, USA : $53,046) |
| Median Family Income (2012) : | $49,201 (Washington : $71,939, USA : $64,585) |
| Median House Price (2012) : | $172,400 (Washington : $272,900, USA : $181,400) |