Black Diamond Wa Cave with Waterfall

Black Diamond is a city in King County, Washington, United States. The population was 4,697 at the 2020 census. In 2023, with a 40.6% gro…
Black Diamond is a city in King County, Washington, United States. The population was 4,697 at the 2020 census. In 2023, with a 40.6% growth rate, Black Diamond was the fastest growing small city in King County.
  • Country: United States
  • State: Washington
  • County: King
  • Established: mid-1880s
  • Incorporated: February 19, 1959
  • Elevation: 653 ft (199 m)
  • Area code(s): 360 and 564

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Data from: en.wikipedia.org