King County grew 1.4 percent between July 1, 2006, and July 1, 2007, according to the U.S. Census, which ranked it 25th among the 100 fastest-growing counties in the country.

Immigrants from other countries are a significant factor to the growth – the 10,681 new residents made up 43 percent of the county’s overall population growth of 25,090, which includes births. Of those moving to King County, 83 percent came from other countries. The rest of the county’s growth came from births, and more people moved here from other counties than left.Between April 1, 2000, and July 1, 2007, 82,502 people moved to King County from other countries. That made up more than two-thirds of the county’s total growth – 122, 241 people – during that time.