Black Diamond

Population: 5,678
Median household income: $144,728
Median home value: $776,400

Located in King County, Washington, Black Diamond is a community with a population of 5,678. Its median household income of $144,728 runs above the King County figure of $122,148.

Between 2019 and 2023, Black Diamond's population grew 26.9% from 4,476 to 5,678, while its median home value rose 87.9% from $413,100 to $776,400.

The typical home was built around 1997. 1.1% of residents live below the poverty line.

Demographics

ACS 2019–2023

Population: 5,678
Median age: 38.1 yrs
Median household income: $144,728
Median home value: $776,400
Median gross rent: $2,340
Housing units: 2,296
Homeownership rate: 87.0%
Bachelor's degree or higher: 56.5%
Unemployment rate: 1.1%

Trends

ACS 5-year · 2019–2023

Population

4,4765,678

Median household income

$108,490$144,728

Median home value

$413,100$776,400

Median gross rent

$1,065$2,340

Year	Population	Median household income	Median home value	Median gross rent
2019	4,476	$108,490	$413,100	$1,065
2020	4,703	$111,250	$464,300	$1,710
2021	5,002	$118,140	$609,200	$1,059
2022	5,314	$134,076	$746,900	$1,417
2023	5,678	$144,728	$776,400	$2,340

Each year is a US Census Bureau ACS 5-year estimate ending that year.

Age distribution

Under 56.3%

5 to 1718.4%

18 to 245.5%

25 to 3414.4%

35 to 4419.1%

45 to 5410.6%

55 to 6414.6%

65 to 746.6%

75 and over4.4%

	Count	Share
Under 5	357	6.3%
5 to 17	1,047	18.4%
18 to 24	315	5.5%
25 to 34	820	14.4%
35 to 44	1,085	19.1%
45 to 54	603	10.6%
55 to 64	827	14.6%
65 to 74	373	6.6%
75 and over	251	4.4%

Race & ethnicity

	Count	Share
White (non-Hispanic)	4,193	73.8%
Black or African American	21	0.4%
American Indian & Alaska Native	0	0.0%
Asian	647	11.4%
Native Hawaiian & Pacific Islander	0	0.0%
Some other race	35	0.6%
Two or more races	243	4.3%
Hispanic or Latino (any race)	539	9.5%

Educational attainment (age 25+)

No high school diploma1.2%

High school graduate12.9%

Some college or associate's29.4%

Bachelor's degree37.0%

Graduate or professional degree19.4%

	Count	Share
No high school diploma	49	1.2%
High school graduate	511	12.9%
Some college or associate's	1,164	29.4%
Bachelor's degree	1,465	37.0%
Graduate or professional degree	770	19.4%

Commute to work

Mean travel time to work: 37 min

Drove alone68.8%

Carpooled7.1%

Public transit0.3%

Walked1.1%

Bicycle0.0%

Worked from home21.5%

Other means1.0%

How workers get to work

	Count	Share
Drove alone	2,170	68.8%
Carpooled	223	7.1%
Public transit	11	0.3%
Walked	36	1.1%
Bicycle	0	0.0%
Worked from home	679	21.5%
Other means	33	1.0%

Travel time

	Count	Share
Under 15 min	297	12.0%
15 to 29 min	597	24.1%
30 to 44 min	712	28.8%
45 to 59 min	460	18.6%
60+ min	407	16.5%

Households

Average household size: 2.60
Poverty rate: 1.1% (65 of 5,678)

	Count	Share
Family households	1,666	76.4%
Nonfamily households	515	23.6%

Housing

Median year structure built: 1997

Occupancy

	Count	Share
Occupied	2,181	95.0%
Vacant	115	5.0%

Tenure (of occupied units)

	Count	Share
Owner-occupied	1,897	87.0%
Renter-occupied	284	13.0%

1-unit, detached91.2%

1-unit, attached2.0%

2 to 4 units0.5%

5 to 19 units0.0%

20 or more units2.7%

Mobile home & other3.7%

Units in structure

	Count	Share
1-unit, detached	2,094	91.2%
1-unit, attached	46	2.0%
2 to 4 units	11	0.5%
5 to 19 units	0	0.0%
20 or more units	61	2.7%
Mobile home & other	84	3.7%

Geography

Place GEOID: 5306330
Type (LSAD): 25
Land area: 6.6 sq mi
Water area: 0.59 sq mi
Center point: 47.3147, -122.0177