Black Diamond, Washington
Black Diamond, Washington | |
|---|---|
Top Works at Mine 11, Black Diamond, ca. 1915. | |
Location of Black Diamond, Washington | |
| Coordinates: 47°18′35″N 122°00′15″W / 47.30972°N 122.00417°W | |
| Country | United States |
| State | Washington |
| County | King |
| Established | mid-1880s |
| Incorporated | February 19, 1959 |
| Government | |
| • Type | Mayor–council |
| • Mayor | Carol Benson |
| Area | |
• Total | 7.20 sq mi (18.65 km2) |
| • Land | 6.60 sq mi (17.09 km2) |
| • Water | 0.59 sq mi (1.54 km2) |
| Elevation | 558 ft (170 m) |
| Population (2020) | |
• Total | 4,697 |
• Estimate (2023) | 6,602 |
| • Density | 1,000.5/sq mi (386.29/km2) |
| Time zone | UTC–8 (Pacific (PST)) |
| • Summer (DST) | UTC–7 (PDT) |
| ZIP Code | 98010 |
| Area codes | 360 and 564 |
| FIPS code | 53-06330 |
| GNIS feature ID | 2409855 |
| Website | blackdiamondwa.gov |
Black Diamond is a city in King County, Washington, United States. The population was 4,697 at the 2020 census. In 2023, with a 40.6% growth rate, Black Diamond was the fastest growing small city in King County.