Black Diamond, Washington Population 2024

7,825

Black Diamond is a city located in King County Washington. Black Diamond has a 2024 population of 7,825. Black Diamond is currently growing at a rate of 10.52% annually and its population has increased by 61.44% since the most recent census, which recorded a population of 4,847 in 2020.

The average household income in Black Diamond is $156,611 with a poverty rate of 0.94%. The median rental costs in recent years comes to - per month, and the median house value is -. The median age in Black Diamond is 40 years, 40.5 years for males, and 38.8 years for females.

Black Diamond Demographics

According to the most recent ACS, the racial composition of Black Diamond was:

  • White: 80.28%
  • Two or more races: 8.86%
  • Asian: 6.87%
  • Other race: 3.22%
  • Black or African American: 0.77%
  • Native American: 0%
  • Native Hawaiian or Pacific Islander: 0%
Land Area (mi²)
6.5 sq mi
Density (mi²)
1,194.80/sq mi
Growth Since 2020
61.44% (2,978)
The current population of Black Diamond, Washington is 7,825 based on our projections of the latest US Census estimates.The last official US Census in 2020 recorded the population at 4,847.

Black Diamond, Washington Population 2024

Population by Race

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Race
Population
Percentage (of total)
White4,26680.28%
Two or more races4718.86%
Asian3656.87%
Other race1713.22%
Black or African American410.77%
Native American00%
Native Hawaiian or Pacific Islander00%

White

Two or more races

Asian

Other race

Black or African American

Native American

Native Hawaiian or Pacific Islander

Black Diamond Population by Race

Black Diamond Population Pyramid 2024

Black Diamond Median Age

40

Total

40.5

Male

38.8

Female

Black Diamond Adults

There are 4,017 adults, (684 of whom are seniors) in Black Diamond.

Black Diamond Age Dependency

59.4

Age Dependency Ratio

20.5

Old Age Dependency Ratio

38.9

Child Dependency Ratio

Black Diamond Sex Ratio

Female2,41045.35%
Male2,90454.65%

Black Diamond Population by Age

Black Diamond Renter vs Owner Occupied by Household Type

Household Type
Count
Average Size
Owner
Renter
All2,0722.5686.413.6
Married1,1953.1396.23.8
Non Family5741.3275.324.7
Male1623.0361.738.3
Female1412.2877.322.7

3.03

Average Family Size

2.56

Average Household Size

86.4%

Rate of Home Ownership

Married

Male

Female

NonFamily

owner

renter

Black Diamond Households and Families

Male

Female

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Less Than 9th Grade

9th to 12th Grade

High School Graduate

Some College

Associates Degree

Bachelors Degree

Graduate Degree

Black Diamond Educational Attainment by Sex (over 25)

Black Diamond Educational Attainment by Race

High School Graduation Rate

Bachelors Rate

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The highest rate of high school graduation is among asian people with a rate of 100%.

The highest rate of bachelors degrees is among 2+ races people with a rate of 61.87%.

Black Diamond Educational Attainment by Race

All

Male

Female

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$76,285

Average Earnings

$106,094

Average Male

$49,364

Average Female

Black Diamond Earnings by Educational Attainment

Black Diamond Language by Age

Only English

Spanish

Other Indo-European Languages

Asian and Pacific Island Languages

Other Languages

Black Diamond Language

90.88% of Black Diamond residents speak only English, while 9.12% speak other languages. The non-English language spoken by the largest group is Spanish, which is spoken by 3.84% of the population.

Black Diamond Language

Black Diamond Poverty by Race

rate

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Name
Total
In Poverty
Poverty Rate
White4,226260.62%
Other1712414.04%
Hispanic475245.05%

0.94%

Overall Poverty Rate

0.83%

Male Poverty Rate

1.08%

Female Poverty Rate

Poverty in Black Diamond

The race most likely to be in poverty in Black Diamond is Other, with 14.04% below the poverty level.

The race least likely to be in poverty in Black Diamond is White, with 0.62% below the poverty level.

The poverty rate among those that worked full-time for the past 12 months was 0%. Among those working part-time, it was 2.34%, and for those that did not work, the poverty rate was 2.78%.

Black Diamond Poverty

rate

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Rate
Poverty
Less Than 9th Grade42.11%
High School1.71%
Some College1.44%
Bachelors or Greater0%

Black Diamond Poverty Rate by Education

rate

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Rate
Poverty
Female Employed2.13%
Male Employed0%
Male Unemployed0%
Female Unemployed0%

Black Diamond Poverty Rate by Employment Status and Sex

Black Diamond Income by Household Type

Households

Families

MarriedFamilies

NonFamilies

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mean

median

Income by Household Type

Black Diamond Marital Status

Married

Widowed

Divorced

Separated

NeverMarried

Marriage Rates

61.3%

Overall Marriage Rate

57.9%

Male Marriage Rate

65.5%

Female Marriage Rate

Black Diamond Married by Age and Sex

male

female

Black Diamond Marriage

The age group where males are most likely to be married is 55-64, while the female age group most likely to be married is 35-44.

Black Diamond Marital Status by Race

Married

Widowed

Divorced

Separated

NeverMarried

Black Diamond Marital Status

Second Gulf War

First Gulf War

Vietnam

Korea

World War II

427

Number of Veterans

427

Male Veterans

0

Female Veterans

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Black Diamond Veterans by War

count

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Black Diamond Veterans by Age

count

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Black Diamond Veterans by Race

Black Diamond Veterans by Education

Less Than 9th Grade

High School Graduate

Some College

Bachelors or Greater

0%

Veteran Poverty Rate

37%

Veteran Disability Rate

Black Diamond Veterans by Education

LaborForceParticipation

73%

Labor Force Participation

72.4%

Employment Rate

0.9%

Unemployment Rate

Black Diamond Employment by Age

LaborForceParticipation

Black Diamond Employment by Race

LaborForceParticipation

Black Diamond Employment by Education

Origin of Non-Citizens

Europe

Asia

Africa

Oceania

Latin America

North America

Non citizens include legal permanent residents (green card holders), international students, temporary workers, humanitarian migrants, and illegal immigrants.

Origin of Naturalized Citizens

Europe

Asia

Africa

Oceania

Latin America

North America

43.15%

Born in Black Diamond

90.53%

Native Born

9.47%

Foreign Born

4.22%

Non Citizen

5.25%

Naturalized

Place of Birth

90.53% of Black Diamond residents were born in the United States, with 43.15% having been born in Washington. 4.22% of residents are not US citizens. Of those not born in the United States, the largest percentage are from Asia.

Black Diamond Place of Birth

Note: data after 2022 is projected based on recent change

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Year
Population
Growth
Growth Rate
202911,5477446.89%
202810,8037457.41%
202710,0587447.99%
20269,3147458.69%
20258,5697449.51%
20247,82574510.52%
20237,08074411.74%
20226,3364988.53%
20215,83899120.45%
20204,847621.3%
20194,7853417.67%
20184,444-4-0.09%
20174,448180.41%
20164,430300.68%
20154,400471.08%
20144,353471.09%
20134,306390.91%
20124,267671.6%
20114,200501.2%
20104,15000%
20003,970-7,577-65.62%

Black Diamond Population by Year