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City Guide · Washington

Black Diamond

Keepsakes.Wall Art.Black Diamond.

Black Diamond is a city in King County, Washington, United States. The population was 4,697 as of the 2020 census,, and was estimated at 6,978 in 2025.

Black Diamond skyline
Photo: Farragutful · CC BY-SA 4.0 Source
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In 2025, with a 48.6% growth rate, Black Diamond was the fastest growing small city in King County.

01 · KEEPSAKES

Keepsakes

Keepsakes for Black Diamond.

02 · WALL ART

Wall Art

Wall Art for Black Diamond.

03 · MIRAMAR

A city to explore

The population was 4,697 as of the 2020 census,, and was estimated at 6,978 in 2025.

Black Diamond
Local Spotlight

Black Diamond stories worth keeping.

Black Diamond is a city in King County, Washington, United States.

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About Black Diamond

Black Diamond, Washington.

The population was 4,697 as of the 2020 census,, and was estimated at 6,978 in 2025. In 2025, with a 48.6% growth rate, Black Diamond was the fastest growing small city in King County. Unsaid gifts are made for that: keepsakes and art that mark a family's growth in Black Diamond.

Black Diamond is a city in King County, Washington, United States.
Keep what matters

Black Diamond is a city in King County, Washington, United States.

Black Diamond is a city in King County, Washington, United States.
The population was 4,697 as of the 2020 census,, and was estimated at 6,978 in 2025.
In 2025, with a 48.6% growth rate, Black Diamond was the fastest growing small city in King County.
In King County
Population 4,697
Located at 47.3121° N
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