Black Diamond
City in Washington State
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Black Diamond is a city in King County, Washington, United States. The population was 4,697 at the 2020 census. In 2022, with a 35% growth rate, Black Diamond was the fastest growing small city in King County. Wikipedia
Population: 6,336 (2022)
ZIP code: 98010
Elevation: 653′
Mayor: Carol Benson
Area code: 360
Established: mid-1880s
Incorporated: February 19, 1959