Seattle Population 2024 Trend. Sultan in snohomish county had the fastest rate of growth of any place in the seattle metro area from 2023 to 2024, increasing in population by more than 6%. From 2010 to 2020, seattle’s population grew by an incredible 21%, outpacing the 16% growth of surrounding king county.
According to the report’s estimates, seattle’s population increased by 5,944, or 0.8%, from july 1, 2022, to july 1, 2023. According to an april 1, 2024 estimate from the washington state office of financial management (ofm), seattle’s population has grown to just a hair short of 800,000 residents.