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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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Shannon and Nick Harper, Senior Director of Strategy & Policy, discuss the MBA's legislative priorities for the 2017 legislative session.

Help advocate for housing

By MBAKS Senior Policy Analyst Allison Butcher

Building permit data from the Census Bureau show 8,430 single-family permits and 16,764 multifamily permits issued in the Seattle metro area through November of last year. This represents an 8 percent decline in single-family permits and a 5 percent increase for multifamily permits compared to the same period in 2017. The release of building permit and other housing data was delayed as a result of the federal government shutdown.

The Builder's Bulletin is intended to provide a convenient way to track housing in our market and includes information from the Northwest Multiple Listing Service, State of the Cities Data Systems, Office of Financial Management and the Washington State Employment Security Department.

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