Black Diamond city, Washington Demographics & Population 2026
As of 2026, Black Diamond city, Washington has a total population of 5,678, the 187th largest city in Washington, with a median household income of $144,728, which is 52% higher than the state average. The poverty rate is 1.1%.
Key Takeaways
- Household income is 52% above the state average — one of the wealthiest communities in Washington.
- An exceptionally low poverty rate of 1.1% — among the lowest in Washington.
- 56.5% of adults hold a bachelor's degree or higher — top 10% in Washington.
- Near full employment with an unemployment rate of just 1.1%.
Black Diamond city Quick Facts
How Black Diamond city Compares
Median Household Income
Median Home Value
Economy & Housing
Household Income Distribution
Employment
Housing Overview
People & Demographics
Age Distribution
Race & Ethnicity
Diversity Index
Moderate diversity with one or two groups making up the majority.
State average: 55 | National average: 60
Education
Educational Attainment (Adults 25+)
Black Diamond city Rankings in Washington
Explore Washington Rankings
Cities Similar to Black Diamond city
These cities in the same state have comparable population and economic profiles.
| City | Population | Median Income | Home Value | Bachelor's+ | Poverty |
|---|---|---|---|---|---|
| Maplewood CDP | 5,766 | $129,659 | $657,400 | 53.9% | 8.8% |
| Hockinson CDP | 5,993 | $132,083 | $661,900 | 44.8% | 2.4% |
| Chain Lake CDP | 4,989 | $148,932 | $830,200 | 42.5% | 3.6% |
| Buckley city | 5,306 | $121,719 | $506,400 | 20.1% | 8.2% |
| Brier city | 6,507 | $138,256 | $824,500 | 46.8% | 3.1% |
Population Overview
Black Diamond city is a small city located in Washington. The total population is 5,678. It ranks as the 187th most populous out of 631 cities and towns in Washington.
Age Demographics
The median age in Black Diamond city is 38.1 years. This is about average than the state median of 38.2 years.
Economy, Income & Housing
The median household income in Black Diamond city is $144,728. This is 52% higher than the state median of $94,952. Compared to the national median of $78,538, household income here is 84% higher. The poverty rate stands at 1.1%. This is 88% lower than the state poverty rate of 9.9%. This exceptionally low poverty rate indicates strong economic prosperity across the community. The unemployment rate is 1.1%. This is 79% lower than the state rate of 5.0%. The median home value is $776,400. Housing costs are 49% higher than the state median of $519,800. The home-value-to-income ratio is 5.4x. 87.0% of occupied housing units are owner-occupied. This homeownership rate is 36% higher than the state average of 63.9%.
Race & Ethnicity
The largest racial or ethnic group in Black Diamond city is White (non-Hispanic), making up 73.9% of the population. Asian residents account for 11.4%. The Black or African American population (0.4%) is well below the state average of 3.8%.
Education
56.5% of residents aged 25 and older hold a bachelor's degree or higher. This places Black Diamond city in the top 10% of all cities in the state for educational attainment. This is 46% higher than the state rate of 38.8%. Nationally, 35.0% of adults hold at least a bachelor's degree. The high school graduation rate (or equivalent) is 98.8%. Notably, 19.4% of adults hold a graduate or professional degree, indicating a highly educated workforce.
Data Sources & Methodology
All demographic data for Black Diamond city, Washington is sourced from the U.S. Census Bureau's American Community Survey (ACS) 5-Year Estimates (2019-2023). The ACS collects data from approximately 3.5 million households annually, providing reliable estimates for communities of all sizes. Comparisons are made against Washington state averages and national averages calculated from the same dataset. Rankings reflect the city's position among all 631 Census-designated places in Washington. For official data, visit data.census.gov.
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Frequently Asked Questions
What is the population of Black Diamond city, Washington?
Black Diamond city, Washington has a population of 5,678 according to the most recent U.S. Census ACS 5-Year Estimates.
What is the median household income in Black Diamond city, WA?
The median household income in Black Diamond city is $144,728, which is 84% higher the national median of $78,538.
What is the poverty rate in Black Diamond city, WA?
The poverty rate in Black Diamond city is 1.1%. This means approximately 65 residents live below the federal poverty line.
What is the racial makeup of Black Diamond city, Washington?
Black Diamond city's population is 73.9% White, 0.4% Black, 9.5% Hispanic/Latino, and 11.4% Asian.
What is the median home value in Black Diamond city, WA?
The median home value in Black Diamond city is $776,400. The home-value-to-income ratio is 5.4x.
How educated is Black Diamond city, Washington?
56.5% of adults (25+) in Black Diamond city hold a bachelor's degree or higher, and 19.4% hold a graduate or professional degree.