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The median home value in Black Diamond, WA is $770,693 as of 2026-06-30, down 2.44% from a year earlier.
Median Home Value
$770,693
Year-over-Year
-2.44%
Population
7,332
Black Diamond ranks #24 of 118 Washington cities tracked here by median home value, and sits 29.8% above the state's city median of $593,862. It sits in King County, where the county-wide median is $858,284.
Black Diamond police recorded a violent crime rate of 27 per 100,000 residents in 2024 — lower than most cities that report to the FBI. Property crime runs at 396 per 100,000.
Reported by the city's own police department to the FBI's Uniform Crime Reporting Program (what this covers).
The median home value in Black Diamond is $770,693. That's down 2.44% from a year earlier. That is about 29.8% above the typical county in Washington.
Homes in Black Diamond are cheaper than King County as a whole, where the median is $858,284 — a difference of about 10.2%.
Black Diamond police reported 27 violent crimes per 100,000 residents, covering a population of about 7,332. Crime rates are one input among many — they vary block to block within a city, and this figure is a citywide average.
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