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CITY

Black Diamond

Washington · 6,978 residents (2025 est.) · 6.598 sq mi
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Notable rankings
#94Fastest growingof 6,811+26.9%#166Lowest poverty rateof 6,8232.1%#232Lowest unemploymentof 6,8261.3%
The short version

Black Diamond is significantly wealthier than the US average, with a median household income of $141,383. The city has grown rapidly, with population up 50% since 2000. 55% of adults hold a bachelor's degree or higher, well above the national rate of 36%. Median home value has more than tripled since 2000, reaching $779,100. Poverty is rare here, at 2.1% of residents. It ranks in the top 5% of US cities for household income.

At a glance
Wealthier
above the US median
US median: $82,259
Mid-age
median age 38.1
US median: 38.9
More educated
55% hold a bachelor's degree
US average: 36%
Less affordable
home values up 135%, inflation adjusted
US median home: $376,019
Section 01

Population & growth

Total population
5,961
+50%since 2000
from 3,970 in 2000
1990 – 2025
Population density
903 / sq mi
+49%since 2009
from 608 / sq mi in 2009
US average: 281
Median age
38.1
+7%since 2000
from 35.7 in 2000
US average: 38.9

PEP 2025 EST:6,978 residents (Census Bureau Vintage 2025, released March 2026)

Population, 1990 – 2024
9682K4K5K6K1990201020202024Black Diamond
20246K
1990201020202024
Age distribution, 2024
Under 56.4%(382)
US avg: 5.6%
5 to 96.4%(380)
US avg: 6%
10 to 148.1%(481)
US avg: 6.4%
15 to 194.2%(249)
US avg: 6.6%
20 to 245%(301)
US avg: 6.5%
25 to 3416.3%(970)
US avg: 13.7%
35 to 4418.1%(1,077)
US avg: 13.2%
45 to 5412.3%(731)
US avg: 12.2%
55 to 6413.1%(781)
US avg: 12.7%
65 to 747.1%(422)
US avg: 10.2%
75 to 842.3%(137)
US avg: 5.1%
85 and over0.8%(50)
US avg: 1.9%
BAR + DOT: THIS PLACE · TICK: US AVERAGE
Section 02

Income & economy

Median household income
$141,383
+16%inflation adjusted, since 2000
from $67,092 in 2000
US average: $82,259
1990 – 2024
Per capita income
$65,562
+143%since 2000
from $26,936 in 2000
US average: $44,673
Households earning $100K+
84.7%
+27.7 ptssince 2009
from 57.0% in 2009
US average: 53.3%
Poverty rate
2.1%
+1.1 ptssince 2000
from 0.9% in 2000
US average: 12.5%
Income inequality (Gini)
0.328
+4%since 2010
from 0.317 in 2010
US average: 0.476
Workforce by industry, 2024
Information13%
US avg: 10.8%
Wholesale trade10.8%
US avg: 6.9%
Other services7.8%
US avg: 6.7%
Finance & insurance7.5%
US avg: 5.9%
Retail trade7.2%
US avg: 9.9%
Professional, scientific, technical6.7%
US avg: 5.1%
Public administration4.2%
US avg: 4.8%
Transportation & warehousing2.2%
US avg: 2.2%
Arts, entertainment, food1%
US avg: 1.9%
Education & health services0.7%
US avg: 0.9%
Agriculture, forestry, fishing0.2%
US avg: 1.6%
Construction0.2%
US avg: 1.2%
Manufacturing0%
US avg: 0.4%
BAR + DOT: THIS PLACE · TICK: US AVERAGE
Section 03

Housing

Median home value
$779,100
+135%inflation adjusted, since 2000
from $182,100 in 2000
US average: $376,019
1990 – 2024
Median gross rent
$1,453
−9%inflation adjusted, since 2000
from $878 in 2000
US average: $1,442
Owner-occupied
86.0%
−4.1 ptssince 2000
from 90.1% in 2000
14.0% rent
Vacancy rate
5.2%
−3.7 ptssince 2009
from 8.9% in 2009
US average: 10.0%
Owner cost-burdened
24.4%
−19.5 ptssince 2009
from 43.8% in 2009
US average: 22.9%
Renter cost-burdened
26.2%
−0.4 ptssince 2009
from 26.5% in 2009
US average: 47.4%
Afford Score
5.5
+45%since 2009
from 3.8 in 2009
2009 – 2024
Our index: median home value divided by median household income. Lower is more affordable.
Gentrification Score
86
Our index, 0 to 100. Higher means faster recent growth in incomes, home values, and college degrees.
RELATED:See current rent listings in Black Diamond on RentDataNow
Section 04

Race & ethnicity

2000
White, non-Hispanic91.9%(3,650)
Black0.1%(3)
Hispanic / Latino2.7%(107)
Asian1%(40)
Other0%
2024
White, non-Hispanic67%(3,996)
Black0.4%(24)
Hispanic / Latino7.9%(472)
Asian17.6%(1,051)
Other7%(418)
Diversity Score
64
+709%since 2009
from 8 in 2009
2009 – 2024
Our index, 0 to 100. Higher means a more even mix of racial and ethnic groups.
Section 04 · Origins

Detailed origins & ancestry

Hispanic origin
Mexican3.3%(197)
Panamanian1.8%(108)
Colombian1.2%(71)
Spaniard0.6%(38)
Puerto Rican0.3%(15)
Asian origin
Asian Indian9.5%(565)
Filipino5%(301)
Korean1.3%(79)
Thai0.7%(42)
Chinese0.4%(26)
Vietnamese0.3%(20)
Burmese0.2%(14)
Pacific Islander origin
Chamorro1.1%(64)
Ancestry
English15.7%(936)
German14.8%(883)
Irish10.9%(652)
Scottish4.2%(253)
Italian4.2%(249)
Norwegian3.8%(225)
American2.6%(155)
French2%(117)
Scotch-Irish1.9%(114)
Swedish1.8%(105)
British1.1%(64)
Polish1.1%(63)
+ 14 more ancestry groups with data
Arab0.9%(51)
Lebanese0.9%(51)
Syrian0.9%(51)
Welsh0.8%(48)
Dutch0.8%(47)
Romanian0.7%(39)
West Indian0.4%(26)
Lithuanian0.3%(18)
Czech0.3%(16)
Canadian0.3%(15)
Russian0.2%(14)
Swiss0.2%(14)
Belgian0.2%(11)
RANKED:Largest English population · Largest German population · Largest Irish population · Largest Asian Indian population · Largest Filipino population
Section 05

Education

Bachelor's degree or higher
54.7%
+32.9 ptssince 2000
from 21.8% in 2000
US average: 35.6%
High school or higher
97.7%
+10.2 ptssince 2000
from 87.5% in 2000
US average: 89.6%
Graduate degree
17.9%
+10.8 ptssince 2000
from 7.1% in 2000
US average: 14.0%
Section 06

Commute & transportation

Average commute
37.5 min
+21%since 2000
from 30.9 min in 2000
US average: 26.5
Drive alone to work
63.9%
−9.0 ptssince 2009
from 72.9% in 2009
US average: 68.9%
Carpooled to work
8.9%
−4.2 ptssince 2009
from 13.1% in 2009
US average: 8.5%
Public transit
0.2%
−3.6 ptssince 2009
from 3.8% in 2009
US average: 3.2%
Worked from home
24.9%
+18.5 ptssince 2009
from 6.5% in 2009
US average: 15.0%
Walked to work
0.8%
−2.0 ptssince 2009
from 2.8% in 2009
US average: 2.4%
Biked to work
0.0%
Unchangedsince 2009
from 0.0% in 2009
US average: 0.4%
No vehicle available
3.5%
+2.6 ptssince 2009
from 0.9% in 2009
US average: 8.3%
Section 07

Work & employment

Unemployment rate
1.3%
−2.6 ptssince 2011
from 4.0% in 2011
US average: 5.2%
Labor force participation
74.1%
+1.2 ptssince 2011
from 72.9% in 2011
US average: 63.5%
Self-employed
12.8%
+3.4 ptssince 2009
from 9.4% in 2009
US average: 13.1%
Management & professional
52.0%
−15.1 ptssince 2009
from 67.0% in 2009
US average: 42.5%
Section 08

People & community

Male
52.2%
+3.0 ptssince 2009
from 49.1% in 2009
Female
47.8%
−3.0 ptssince 2009
from 50.9% in 2009
Foreign born
19.0%
+14.8 ptssince 2009
from 4.1% in 2009
US average: 14.1%
Veterans
5.9%
−44.3 ptssince 2009
from 50.3% in 2009
US average: 6.2%
With a disability
8.2%
Unchangedsince 2012
from 8.2% in 2012
US average: 13.3%
Uninsured
2.5%
−91.4 ptssince 2013
from 93.9% in 2013
US average: 8.4%
Broadband at home
95.9%
+9.1 ptssince 2017
from 86.8% in 2017
US average: 91.0%
English only at home
82.0%
−10.9 ptssince 2016
from 92.9% in 2016
US average: 77.7%
Spanish at home
3.8%
−0.9 ptssince 2016
from 4.7% in 2016
US average: 13.6%
Marital status
Men 15+
Never married30.1%(778)
Married60.9%(1,577)
Widowed2.5%(64)
Divorced6.6%(170)
Women 15+
Never married21.6%(460)
Married65.4%(1,392)
Widowed5.1%(109)
Divorced7.9%(168)
SHARE WITHIN EACH SEX · POPULATION 15 AND OVER · 2024
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Frequently asked

How many people live in Black Diamond, Washington?

Black Diamond, Washington has about 5,961 residents according to the 2024 American Community Survey.

What is the median household income in Black Diamond, Washington?

The typical household in Black Diamond, Washington earns about $141,383 a year. Half of households make more than that, and half make less.

Is Black Diamond, Washington expensive?

In Black Diamond, Washington, the median home is worth about $779,100, and the typical rent is about $1,453 a month.

How educated are people in Black Diamond, Washington?

About 54.7% of adults age 25 and over in Black Diamond, Washington hold a bachelor's degree or higher.

What is the poverty rate in Black Diamond, Washington?

About 2.1% of people in Black Diamond, Washington live below the federal poverty line.

Has Black Diamond, Washington grown since 1990?

Yes, Black Diamond, Washington has grown since 1990. The population has added about 4,539 residents, a change of about 319 percent over that period.

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DATA: US CENSUS BUREAU ACS 5-YEAR + DECENNIAL CENSUS · UPDATED 2024

How we source and harmonize this data →