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King County, Washington

Explore local resources and participating businesses in King County, Washington.

King County at a Glance

Population2,344,939 (July 1, 2025 Census estimate)
County SeatSeattle
Largest City (2026)Seattle (2026 OFM)
Year Organized1852 (organized; NACo County Explorer)
ZIP Code Examples98001, 98008, 98010, 98058, 98092
Total Area, Including Water2,307.453 square miles, including water (2020 Census geography)
Major RoutesI-5, I-90, I-405
Local Area Codes206 / 253 / 425 / 564
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Discover King County

King County

King County was created in 1852 and originally named for William Rufus King. County leaders began pursuing a change of namesake in 1986, and state legislation in 2005 formally honored Dr. Martin Luther King Jr. The name remained the same while its commemorative meaning changed. County archives document other institutional and community developments, offering evidence of how public decisions affect local places. This combination of symbolic identity and documentary history provides a useful introduction beyond the region's best-known urban landmarks.

Use the county's namesake history as a starting point for exploring civic identity, then choose a particular community or archival topic for greater detail. Records collections and public landmarks provide different kinds of experience. Confirm current research arrangements before visiting the archives, and narrow the inquiry by place and date. A focused approach can reveal county-wide connections that are easy to miss in a visit centered only on Seattle's main attractions.

What Shapes Us

Place And Character

Martin Luther King Jr. County archives preserve another dimension of local life, connecting Seattle-area institutions with communities and public decisions across a wider regional landscape.

The Local Story

King County was created in 1852 and originally named for William Rufus King. County leaders began pursuing a change of namesake in 1986, and state legislation in 2005 formally honored Dr.

Explore The County

Use the county's namesake history as a starting point for exploring civic identity, then choose a particular community or archival topic for greater detail.

Discover the community decisions that shape a shared civic identity.
West Seattle Blog · West Seattle

ELECTION 2026: One more look at 34th District State House Position 2 candidate Mary Anito

(WSB photo) By Tracy Record West Seattle Blog editor Your decisions to make on the general-election ballot include…

Read the Story Oct 26, 2026 • Read at source
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Meet Local Businesses

Support the businesses that help make our communities thrive. From family-owned shops and restaurants to trusted local services, discover businesses worth visiting throughout the county.

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County Resources

Find the Right Local Connection

Start with the organization responsible for the service you need. Follow its official link for current requirements, office locations and availability.

Get to Know King County

Useful answers for residents, visitors and anyone planning their next step.

Local Questions

King County Questions, Answered

Explore practical details about the county and the organizations that serve it.

2,344,939 (July 1, 2025 Census estimate). This is a dated Census Bureau estimate, rather than a live resident count.

Shop - Dine - Discover

Meet Local Businesses

Support the businesses that help make our communities thrive. From family-owned shops and restaurants to trusted local services, discover businesses worth visiting throughout the county.

ACE Masonry Corp advertisement
My Local Guide

Find Something Fun

Make Time to Explore

Browse local places by the kind of day you have in mind.

Explore King County

Featured local businesses

ACE Masonry Corp

Parks and outdoor places

Lake Sammamish State Park — Plan a visit using the official park information.

King County parks and trails

Getting around

King County Metro

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