Population Data
| King County | |
| 2007 Total Population | 1,859,574 |
| 2012 Total Population | 1,943,506 |
| 2007 - 2012 Annual Rate | 0.89% |
| Pierce County | |
| 2007 Total Population | 782,855 |
| 2012 Total Population | 842,507 |
| 2007 - 2012 Annual Rate | 1.48% |
| Snohomish County | |
| 2007 Total Population | 685,472 |
| 2012 Total Population | 745,663 |
| 2007 - 2012 Annual Rate | 1.7% |