Black Diamond, WA demographics:
population, income, and more

Total population
5,961
5.0% year-over-year change
Median household income
$141,383/yr
-2.3% year-over-year change
Housing units
2,442
6.4% year-over-year change

Black Diamond population

How many people live in Black Diamond

Black Diamond is home to 5,961 residents, according to the most recent Census data. Gender-wise, 52.2% of Black Diamond locals are male, and 47.8% are female.

Total population
5,961
5.0% year-over-year change
Gender ratio
Male
52.2%
3,109
Female
47.8%
2,852
Value Percent YoY change
Male 3,109 52.2% 3.6%
Female 2,852 47.8% 6.6%
A higher population often means more rental variety and livelier areas. The gender balance—how many men live here compared to women—can reveal a lot about the community and the lifestyles of its residents. Use this info to get a sense of the area's pace and personality.

Age demographics

The median age in Black Diamond is 38, with the population distributed as follows: about 20.8% are children under 15, then 9.2% are in the 15 to 24 age group. Adults between 25 and 44 make up 34.3% of the population, while another 25.4% fall into the 45 to 64 bracket. Finally, around 10.2% are 65 or older.

Median age
38.1
Age breakdown
Under 15
20.8%
15 to 24
9.2%
25 to 44
34.3%
45 to 64
25.4%
Over 65
10.2%
Value Percent YoY change
Under 15 1,243 20.8% 2.0%
15 to 24 550 9.2% 10.0%
25 to 44 2,047 34.3% 7.5%
45 to 64 1,512 25.4% 5.7%
Over 65 609 10.2% -2.4%
The age composition helps you get insight into who lives in the area. A younger population might mean a more active, fast-paced vibe, while an older one could suggest a quieter, slower lifestyle. If there's a balanced makeup, you’re likely to find a variety of services, housing types, and community spaces that cater to different life stages.

Racial makeup

In Black Diamond, 79% of the population are US-born citizens, while 10.6% have gained naturalized citizenship. At the same time, 10.4% of residents are non-citizens. As for race, 67.8% of locals are Caucasian, 0.4% are African American and 17.9% have Asian roots. There’s also a share of 11.1% that includes residents with two or more races.

Citizenship
U.S.-born citizens
79%
Non-U.S.-born citizens
10.6%
Non-citizens
10.4%
Value Percent YoY change
U.S.-born citizens 4,711 79% -0.9%
Non-U.S.-born citizens 631 10.6% 16.6%
Non-citizens 619 10.4% 62.0%
Racial breakdown
White
67.8%
Black or African American
0.4%
American Indian and Alaska Native
0%
Asian
17.9%
Native Hawaiian and other Pacific Islander
0%
Two or more races
11.1%
Other
2.8%
Value Percent
White 4,043 67.8%
Black or African American 24 0.4%
Asian 1,067 17.9%
Two or more races 662 11.1%
Other 165 2.8%

Households in Black Diamond

A peek inside Black Diamond households

Black Diamond has 2,316 households, with an average of 3 members in each. Of these, 75.5% are families, while the remaining 24.5% are made up of individuals living alone or with non-relatives, such as roommates.

Households stats

Total households
2,316
6.2% year-over-year change
Average people per household
3
Non-family households
567
Family households
1,749
Value Percent YoY change
Non-family households 567 24.5% 10.1%
Family households 1,749 75.5% 5.0%
The mix between family and non-family households gives a glimpse into daily life. A higher percentage of families might mean more parks and schools, while more non-family setups can mean flexible housing and diverse living styles. For renters, this can signal what kinds of homes are common and can help you figure out if the area matches your lifestyle.

Housing in Black Diamond

The housing landscape of Black Diamond

Black Diamond's housing consists of 2,442 units, with 84.9% being detached single-family homes ideal for those wanting space. Attached options, including duplexes and townhouses, make up 5.2% and offer a more compact, shared living style. Then there are the multifamily buildings in the area, and for those seeking flexibility, non-traditional options like mobile homes account for 2.6% of the housing landscape.

Housing units
2,442
6.4% year-over-year change
Housing types
Value Percent
1 unit, detached 2,073 84.9%
1 unit, attached 127 5.2%
3 or 4 units 57 2.3%
10 to 19 units 43 1.8%
50 or more units 48 2%
Mobile home 63 2.6%
Boat, RV, van, etc. 31 1.3%
Homes built since 2020
567
40.7% year-over-year change

The age of buildings in Black Diamond

In Black Diamond, the median construction year is 2000. About 5.8% of homes were built before the 1940s, with another 1.1% going up by 1949. Most development happened in the second half of the 20th century. Then, 9.1% of homes were added from 2000 to 2009, 17.7% between 2010 and 2019, and 23.2% are part of the newest wave of development.

Construction year breakdown by decade
Value Percent YoY change
Built in 1939 or earlier 141 5.8% -18.0%
Built between 1940 and 1949 27 1.1% 125.0%
Built between 1950 and 1959 62 2.5% -27.9%
Built between 1960 and 1969 131 5.4% -25.1%
Built between 1970 and 1979 98 4% -14.0%
Built between 1980 and 1989 50 2% -55.0%
Built between 1990 and 1999 710 29.1% 7.1%
Built between 2000 and 2009 223 9.1% 16.8%
Built between 2010 and 2019 433 17.7% 17.3%
Built in 2020 or later 567 23.2% 40.7%
As a renter, knowing when homes were built helps you understand the potential condition and design of rental units. Newer builds may have more contemporary layouts, while older homes can offer character or larger lots, depending on the area.

Black Diamond occupancy rates

Out of the 2,316 occupied housing units in Black Diamond, 86% are owner-occupied, while 14% are lived in by tenants. Meanwhile, 5.2% of all homes on the local market sit vacant.

Occupied housing units
2,316
6.2% year-over-year change
Occupancy breakdown
Renter occupied
325
Owner occupied
1,991
Value Percent YoY
change
Renter occupied 325 14% 14.4%
Owner occupied 1,991 86% 5.0%
Unoccupied housing units
5.2%
Unoccupied housing units refer to homes that are currently without residents—whether they're waiting for renters or owners, used seasonally, or simply unclaimed. A higher share of empty homes may mean more housing availability, while a low number can reflect a tighter market with more competition. This, along with the renter-vs.-owner mix, helps paint a clearer picture of what types of housing and services are likely to be available in the area.

Black Diamond housing costs

Housing costs in Black Diamond come to a median of $2,667 per month, while tenants specifically pay a median gross rent of $1,453.

Median housing costs per month
$2,667/month
This figure sums up typical monthly housing costs for all households in the area. If you own, it includes mortgage payments in addition to property taxes, insurance and HOA fees. If you rent, it accounts for rent plus extras like utilities. It’s useful for seeing how local living expenses stack up compared to other places.
Median gross rent in Black Diamond
$1,453/month
Gross rent gives a more complete look at what renters actually pay, including not just base rent, but also utilities and fees. It’s a key number for evaluating rental affordability in your area of interest and understanding how it compares to nearby locations.

Education in Black Diamond

Black Diamond education at a glance

About 18.4% of the population in Black Diamond went to high school, while 16.9% pursued college studies. Another 11.3% earned an associate degree and 35% hold a bachelor’s. Meanwhile, 17.1% went even further, earning a master’s or doctorate.

Education level
Value Percent YoY change
No high school 61 1.4% 144.0%
High school diploma 826 18.4% 11.6%
College diploma 755 16.9% -0.8%
Associate degree 507 11.3% 10.0%
Bachelor's degree 1,565 35% 4.3%
Graduate degree 764 17.1% -2.9%
A community’s education mix can offer insights into the local economy and housing market. Higher levels of education often align with more job opportunities and stable incomes, which can increase demand for homes and influence both rent prices and rental availability.

Income in Black Diamond

How much people earn in Black Diamond

The average annual household income in Black Diamond was $166,104 in 2024, the most recent annual data available, according to the U.S. Census Bureau. This marked a -3.9% change from the previous year. At the same time, the median income stood at $141,383, reflecting a -2.3% shift over the same period.

Average household income in Black Diamond
$166,104/year
-3.9% year-over-year change
Median household income in Black Diamond
$141,383/year
-2.3% year-over-year change

Black Diamond income by age

In Black Diamond, households led by residents aged 25 to 44 — usually in the early to mid stages of their careers — have a median income of $148,781. Those with someone between 45 and 64 in charge, often well established professionally, earn $129,940 overall. Overall, 97.9% of the locals in this community live above the poverty line.

Income breakdown by age
Value YoY change
25 - 44 $148,781 -6.8%
45 - 64 $129,940 -3.0%
Over 65 $93,636 -6.5%
Above poverty level
5,729
Below poverty level
125
Value Percent YoY
change
Above poverty level 5,729 97.9% 3.4%
Below poverty level 125 2.1% 92.3%

Average renter income in Black Diamond

To get a better sense of what renters earn on average in Black Diamond, their median household income was $88,333 according to 2022 Census data. In addition, the rent-to-income ratio in the area, at 19.7%, shows what portion of their earnings goes toward housing expenses.

Renter median household income
$88,333
Rent-to-income ratio
19.7%
Understanding the rent-to-income ratio can help renters gauge if local housing costs align with their earnings. A ratio under 30% usually signals affordability, while exceeding this mark means rent is taking a larger-than-recommended bite out of income. That could make it harder for you to cover other costs like transportation, healthcare, or child care.

Employment in Black Diamond

Workforce and job types in Black Diamond

The job market in Black Diamond is powered by 3,353 working residents, spread across a range of industries and roles. 80.6% of the working population are employed in professional or administrative positions, while 19.4% are in hands-on or service-based jobs. Also, 8.2% run their own businesses, 70.3% are employed by private companies, and 17.2% work in the public sector.

Workforce demographics

Working population
3,353
4.1% year-over-year change
White collar
2,701
Blue collar
652
Value Percent YoY change
White collar 2,701 80.6% 3.9%
Blue collar 652 19.4% 4.7%
Employer type
Self employees
8.2%
Private companies
70.3%
Governmental workers
17.2%
Not for profit companies
4.3%
Value Percent YoY change
Self employees 275 8.2% -3.5%
Private companies 2,357 70.3% 5.8%
Governmental workers 578 17.2% 1.1%
Not for profit companies 143 4.3% 4.4%
Unemployment rate
1.3%
28.6% year-over-year change

Available workforce

The unemployment rate in Black Diamond stands at 1.3%, representing the share of the workforce currently without a job and actively looking for one.

For renters, the unemployment rate helps paint a picture of job security and financial stability in the area. Rates around 4% to 5% are considered typical. A lower-than-average rate might suggest strong job prospects and a thriving local economy, while a higher rate could hint at fewer opportunities—both useful to consider when planning a move.

Transportation in Black Diamond

How people get around in Black Diamond

Commuting methods vary: 72.8% of residents travel by personal vehicle and 0.8% prefer to walk, while the remaining share relies on public transit or on two wheelers to get from A to B.

Means of transportation
Value Percent YoY change
Car 2,378 72.8% -0.6%
Subway or elevated 7 0.2% N/A
Walk 26 0.8% -27.8%
Understanding how locals get to work can help you plan your own routine. High car usage might mean you’ll need a vehicle, while strong public transit or walkability could save you the hassle. Commute times also play a big role in quality of life—shorter trips can give you more time for the things you enjoy.

What is the median and average household income in Black Diamond by zipcode?

Zipcode Population Number of households Median income Average income
98010 6,857 2,649 $142,048 $170,491

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FAQs about Black Diamond demographics 

What is the total population of Black Diamond?

Black Diamond has a total population of 5,961 residents, according to the latest release from the U.S. Census Bureau: the 2019-2023 American Community Survey (ACS) 5-year estimates. This figure changed by +5.0% compared to a year ago.

What is the gender ratio in Black Diamond?

The gender ratio in Black Diamond is as follows:
  • 52.2% males (3,109 residents)
  • 47.8% females (2,852 residents)

What is the median age in Black Diamond?

The median age in Black Diamond is 38.1.

What is the age distribution of the population in Black Diamond?

The age distribution in Black Diamond is as follows:
  • Under 15: 20.8% (1,243 residents)
  • Ages 15-24: 9.2% (550 residents)
  • Ages 25-44: 34.3% (2,047 residents)
  • Ages 45-64: 25.4% (1,512 residents)
  • Over 65: 10.2% (609 residents)

What is the racial and ethnic makeup of Black Diamond?

The racial and ethnic makeup of Black Diamond is as follows:
  • White: 67.8% (4,043 residents)
  • Black or African American: 0.4% (24 residents)
  • American Indian and Alaska Native: 0% (0 residents)
  • Asian: 17.9% (1,067 residents)
  • Native Hawaiian and Other Pacific Islander: 0% (0 residents)
  • Two or More Races: 11.1% (662 residents)
  • Other: 2.8% (165 residents)

What percentage of the population in Black Diamond are U.S.-born citizens?

U.S.-born citizens represent 79% of the population in Black Diamond.

How many housing units are there in Black Diamond?

There are 2,442 housing units in Black Diamond, reflecting a +6.4% change compared to the previous year, according to the latest data from the U.S. Census Bureau.

How many households are in Black Diamond and what is the average household size?

Black Diamond has a total of 2,316 households, with an average of 3 people in each.

What is the median household income in Black Diamond?

Black Diamond has a median household income of $141,383, representing a -2.3% shift from the previous year, according to the U.S. Census Bureau.

What is the employment rate and job market overview for Black Diamond?

The employment rate is 98.7% in Black Diamond, with a workforce of 3,353 residents. Here’s a detailed breakdown of the local job market:

Job types:
  • White-collar workers: 80.6% (2,701 residents)
  • Blue-collar workers: 19.4% (652 residents)

Places of employment:
  • Self-employed: 8.2% (275 residents)
  • Private companies: 70.3% (2,357 residents)
  • Governmental workers: 17.2% (578 residents)
  • Not-for-profit companies: 4.3% (143 residents)

Data source & methodology

The demographic data on this page was sourced from the latest U.S. Census Bureau release—the 2019–2023 American Community Survey (ACS) 5-year estimates.

The information, issued annually, is compiled and published by the Point2Homes Research Team as soon as new data becomes available.

No representation, guarantee, or warranty is made concerning the accuracy or completeness of modified or aggregated information for particular areas.

Page last updated: September 2025