Where does this demographic data come from?

All demographic data comes from the U.S. Census Bureau's American Community Survey (ACS) 5-Year Estimates, which samples about 3.5 million households annually. The 5-year estimates provide the most reliable data for small geographies like municipalities.

What is the difference between Census data and ACS data?

The decennial Census (conducted every 10 years) is a full population count focusing on basic demographics. The ACS is an ongoing survey that collects detailed data on income, education, housing, commute patterns, and more. ACS data is updated annually but represents averages over a 5-year period.

How accurate is this data for small towns?

For smaller municipalities, ACS estimates have wider margins of error because fewer residents are sampled. The 5-year estimates reduce this uncertainty by averaging over a longer period. For towns under 5,000 people, treat specific numbers as approximations rather than precise counts.

Black Diamond, WA Population, Income & Demographics 2026

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Demographics — 2024 ACS 5-Year Estimatesi

Census

Populationi

5,961

Median Agei

38.1

Race & Ethnicityi

White

67%3,996

Asian

17.6%1,051

Hispanic/Latino

7.9%472

Two or More

6.4%384

Other

0.6%34

Black

0.4%24

Educational Attainment (Age 25+)i

GED/Alternative

4%168

High School Diploma

10.8%452

Some College (<1 yr)

5.8%242

Some College (1+ yr)

10.6%442

Associate's Degree

11.7%489

Bachelor's Degree

36.8%1,535

Master's Degree

13.8%575

Professional Degree

2.3%97

Doctorate

1.8%74

HS or Higher

97.7%

BA or Higher

54.7%

Graduate+

17.9%

Housingi

Median Home Valuei

$779,100

Median Renti

$1,453

Tenure

Owner-Occupied

86%1,991

Renter-Occupied

14%325

Total Units

2,442

Homeownership

86%

Vacancy Rate

5.2%

Home Values

$200K–$300K

0.8%15

$300K–$500K

11.2%223

$500K–$1M

64.5%1,285

$1M+

23.5%468

Rent Distribution

Under $500

$1,000–$1,250

$1,250–$1,500

$1,500–$2,000

$2,000+

134

Year Built

2020 or later

23.2%567

2010–2019

17.7%433

2000–2009

9.1%223

1990–1999

29.1%710

1980–1989

2%50

1970–1979

4%98

1960–1969

5.4%131

1950–1959

2.5%62

1940–1949

1.1%27

1939 or earlier

5.8%141

Heating Fuel

Utility Gas

65.6%1,519

Electricity

30.7%712

Bottled/LP Gas

1.9%43

Wood

1.3%30

No Fuel

0.5%12

Economyi

Median Household Incomei

$141,383

Mean Household Incomei

$166,104

Per Capita Incomei

$65,562

Poverty Ratei

2.1%

Unemploymenti

1.3%

Labor Forcei

3,398

Household Income Distribution

$15K–$20K

1.2%28

$20K–$25K

0.8%18

$25K–$30K

0.6%14

$30K–$35K

0.9%22

$35K–$40K

1.3%30

$40K–$45K

4%92

$60K–$75K

6.5%151

$75K–$100K

9%208

$100K–$125K

19%441

$125K–$150K

11.8%274

$150K–$200K

14.2%329

$200K+

30.6%709

Ancestry & Heritage

Self-reported ancestry groups. Residents may report multiple ancestries, so totals may exceed 100%.

Foreign-Born Populationi

Foreign-Borni

1,13119%

By Region

Top Countries

India

455

Philippines

120

Mexico

112

Canada

Korea

China

Commute & Transportationi

Workersi

3,268

Avg. Commutei

37.5 min

How People Get to Work

Travel Time to Work

Workforce

Total Employed

3,353

Occupations

Industries

Social Characteristicsi

Marital Status (15+)i

Veteransi

266(5.9% of civilian adults)

Health Insurancei

97.5%Insured

2.5%Uninsured