Who is the longest-lived person in our state? We researched and identified the three oldest residents on record. I also checked which county has the oldest resident. And is there possibly a hidden community or cove of centenarians in any specific county in Washington?

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What is the oldest county in Washington?

Jefferson County (home to Port Townsend) is recognized as Washington’s "oldest" county based on median age , which rose from 53.9 years in 2010 to 64.1 years in 2023. In 2023, it had the highest percentage of residents aged 85 and older (3.7%) in the state, and 43.5% of its population was 65 and older. While this doesn’t directly confirm the highest number of centenarians, the large proportion of older residents suggests Jefferson County is

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