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Welcome To KEY TO THE CITY's Page For
Black Diamond
King County, Washington


Page Contents for Black Diamond, Washington

Statistics & Facts


History & History-related items

City Attractions




Statistics & Facts

The Washington state capital is Olympia.
The population of Black Diamond is approximately 2,085 (1997), 4151 (2010).
The approximate number of families is 579 (1990), 1546 (2010).
The amount of land area in Black Diamond is 8.381 sq. kilometers.
The amount of surface water is 0.212 sq kilometers.
The distance from Black Diamond to Washington DC is 2447 miles.
The distance to the Washington state capital is 47 miles. (as the crow flies)
Black Diamond is positioned 47.31 degrees north of the equator and 122.00 degrees west of the prime meridian.
Black Diamond elevation is 628 feet above sea level.
Black Diamond median income is $ 28,155 (1990).


on Hwy 169, south of Interstate 90, in southeast King County about 30 miles southeast of Seattle. It is near Renton (18 miles), and Enumclaw (8 miles)
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History & History Related Items

Black Diamond was established over a hundred years ago, when coal was discovered here. Coal mining began around the 1880's. The town was named a few years later for the Black Diamond Coal Company of California. By 1895, the company was the major developer for coal in the area. At its peak around 1900, the town had around 3,500 people, many of which worked in the industry in some way. The coal was moved to the Seattle area via the railroad. After World War I, the town shut down its coal operations. The city was incorporated in 1959. At present, the area is experiencing rapid growth. Black Diamond is known for its pure, stable water supply.
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The founding of Black Diamond

about 1900

The incorporation of Black Diamond



Flaming Geyser State Park

Black Diamond Historical Museum
PO Box 232
32627 Railroad Ave at Baker St
Black Diamond WA 98010
Phone: 360-886-2142 This museum has exhibits of 19th century machinery, a jail and more.
Please call ahead for hours of operation
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Black Diamond City Government

Black Diamond Fire Department
PO Box 249
Black Diamond, WA 98010
Phone: 253-631-2608 or 360-886-1229
Fax: 253-631-1899

Black Diamond Police Department.

Black Diamond Libraries

Black Diamond Library Black Diamond


The city of Black Diamond population was:
1980 - 1,170
1990 - 1,422
1997 - 2,085

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