TNS Financial Services publishes a report every year of the top 10 counties with the most millionaire households (net worth, not including the value of their homes.) King County was ranked number 10 on the list! King includes the cities of Seattle, Redmond, Bellevue, and Sammamish (where I live.) In all fairness, King County is the 12th largest county by population in the United States so it stands to reason that we would have a few more millionaires. This county has over 68,000 millionaires which is roughly 3.7% of the county's population. I hope to be adding to that number some day. [source]
Thanks to TimS for alerting me to the story.