This may come as unwelcome news to voters in other parts of Washington: King County has even more weight to throw around in statewide elections now.
The county’s share of Washington’s population rose from 28.7 percent in 2010 to 29.1 percent in 2012, according to recently released data from the Census Bureau.
Not only has King County increased its presence in Washington — it’s also crossed a major population threshold: the county hit the two-million mark in 2012.
King’s population is estimated to be 2,007,440 — an increase of 76,194 people since 2010. King is now one of 14 U.S. counties with more than two million residents.
Most of King’s population gains come from folks moving into the county from other places, rather than “natural” increase (that is, births minus deaths). Between 2010 and 2012, King County gained 48,286 residents; slightly more than half of those came here from outside the United States.
Among the nation’s largest counties, King is also one of the fastest growing. Since the 2010 Census, King’s population has grown by 3.95 percent — that ties for 14th among the 100 most populous counties in the U.S.
Even so, King isn’t the fastest-growing county in the state. Franklin County in south-central Washington takes that honor, with a growth of 9.8 percent between 2010 and 2012.
In fact, Census data show that Franklin County is the nation’s 10th fastest-growing county among those with at least 10,000 residents. It is the only Washington county among the 100 fastest growing in the U.S.