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Puget Sound Population Surge Led by Seattle, King County

As of April 1, 2025, the Puget Sound region reached a population of 4,534,300, growing by 50,400 people over the past year. This growth was led overwhelmingly by King County, which added 33,600 residents—accounting for two-thirds of the region's total increase. Seattle alone contributed nearly 19,000 new residents, surpassing 816,000 and outpacing the combined growth of Snohomish and Pierce counties. While Snohomish (+6,700) and Pierce (+7,300) counties saw steady, modest increases, growth in transit-connected suburbs like Shoreline and Redmond stood out. Kitsap County grew by 2,800, maintaining its trend of stable, moderate expansion. Overall, the region’s growth reflects continued urban and transit-oriented population shifts, even as statewide growth slows compared to previous years.

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By Economic Development Council

The Master Builders Association of King and Snohomish Counties (MBA) is the nation's oldest and largest local homebuilders association. The MBA serves every area of the residential homebuilding industry and the EDC was able to get the inside scoop from Shannon Affholter, Executive Director on the organization's services and long-term goals.

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Shannon talks to Jenny Steiner, Builders Interiors, about her company and how their MBA membership helps them continue to grow.

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