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> Washington > Zip Code 99138
| Zip Code : | 99138 |
| City : | Inchelium, Twin Lakes |
| County : | Ferry County |
| State : | Washington (WA) |
| Land Area : | 527.97 sq mi |
| Water Area : | 31.18 sq mi |
| Latitude : | 48.2058431 |
| Longitude : | -118.3958233 |
| Population (2010): | 1,209 |
| Population Estimate (2012) : | 1,074 |
| Population Density : | 2.29/sq mi |
| Housing Units (2012) : | 735 |
| Median Household Income (2012) : | $25,900 (Washington : $59,374, USA : $53,046) |
| Median Family Income (2012) : | $37,642 (Washington : $71,939, USA : $64,585) |
| Median House Price (2012) : | $108,100 (Washington : $272,900, USA : $181,400) |