Black Diamond
A town in King County, Washington — population 5,403 as of 2020.
Today
70°F
Light Rain Likely74% precip
Tonight
52°F
Mostly Cloudy11% precip
Sunday
70°F
Partly Sunny7% precip
Sunday Night
50°F
Mostly Clear1% precip
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Black Diamond by the numbers
Population
5,403Population figure, 2020
Households & income
- Area
- 6.6 sq mi (17.09 km²), 0.59 sq mi water
- Median age
- 38.1
- Households
- 2,316
- Persons per household
- 2.6
- Median household income
- $141,383
- Median house value
- $779,100
Municipal office
- Office
- MAYOR
- Address
- PO BOX 599, BLACK DIAMOND, WA 98010