Black Diamond
City in King County, Washington
Black Diamond is a city in King County, Washington, with 4,697 residents (2020 Census). It sits at 653 ft (199 m) above sea level. The nearest town is Ravensdale, 3.9 miles NE.
- 4,697residents (2020 Census)
- 653 ftelevation · 199 m
- 6.6 sq miland area · 17.1 km²
- 712 / sq mipopulation density
- 98010ZIP code
About Black Diamond
Black Diamond is a city in King County, Washington, United States. The population was 4,697 as of the 2020 census,, and was estimated at 6,978 in 2025. In 2025, with a 48.6% growth rate, Black Diamond was the fastest growing small city in King County.
Text: Wikipedia · CC BY-SA 4.0
Black Diamond weather: 7-day forecast
Loading the National Weather Service forecast…
Source: National Weather Service (NOAA).
Live webcams in Black Diamond
Webcams: Windy.com
Living in Black Diamond
- Median household income
- $141,383
- Median home value
- $779,100
- Median rent
- $1,453/mo
- Median age
- 38.1
Do you know Black Diamond? Tell us about it
Help other travelers: share what makes Black Diamond special. We review every message before publishing it.
Map of Black Diamond
Tap any street on the map to see it in Street View below. Map: © OpenStreetMap contributors.
Black Diamond Street View
Drag the image to look around and tap the arrows on the ground to move. If it says there is no imagery, tap a nearby street on the map above.
Open in Google Maps ›Black Diamond, WA population
Black Diamond had 4,697 residents in the 2020 Census.
| 2020 Census | 4,697 |
|---|---|
| Density | 712 per sq mi (275 per km²) |
Source: U.S. Census Bureau, Decennial Census.
Black Diamond at a glance
| State | Washington (WA) |
|---|---|
| County | King County |
| Type | City |
| Population | 4,697 (2020) |
| Land area | 6.60 sq mi (17.1 km²) |
| Water area | 0.59 sq mi (1.54 km²) |
| Elevation | 653 ft (199 m) |
| Coordinates | 47.3121° N, 122.0174° W |
| ZIP code | 98010 |
| Official website | ci.blackdiamond.wa.us |
| Census code (GEOID) | 5306330 |
Sources: U.S. Census Bureau (Gazetteer, ZCTA), USGS GNIS, Wikidata.
Towns near Black Diamond
- Ravensdale3.9 mi NE
- Maple Valley3.9 mi N
- Lake Morton-Berrydale4.3 mi W
- Lake Holm5.3 mi W
- Covington5.5 mi NW
- Hobart6.9 mi N
- Shadow Lake7.1 mi NW
- Enumclaw7.7 mi S
- Auburn9.1 mi W
- Lake Tapps9.6 mi SW
- Maple Heights-Lake Desire9.8 mi N
- Mirrormont10.3 mi N
Straight-line distance between town centers.
Frequently asked questions about Black Diamond
What county is Black Diamond in?
Black Diamond is in King County, Washington.
What is the population of Black Diamond, WA?
4,697 people lived in Black Diamond at the 2020 Census.
What is the ZIP code of Black Diamond, WA?
The ZIP code of Black Diamond is 98010.
What is the elevation of Black Diamond?
653 feet (199 m) above sea level.
What towns are near Black Diamond?
Ravensdale (3.9 mi), Maple Valley (3.9 mi), Lake Morton-Berrydale (4.3 mi), Lake Holm (5.3 mi), Covington (5.5 mi).
Last updated: