None of the households in Black Diamond, WA reported speaking a non-English language at home as their primary shared language. This does not consider the potential multi-lingual nature of households, but only the primary self-reported language spoken by all members of the household.
89.6% of the residents in Black Diamond, WA are U.S. citizens.
In 2024, the median property value in Black Diamond, WA was $779,100, and the homeownership rate was 86%.
Most people in Black Diamond, WA drove alone to work, and the average commute time was 37.5 minutes. The average car ownership in Black Diamond, WA was 2 cars per household.