Black Diamond ZIP Codes — King County, WA

There is one unique ZIP code in Black Diamond, Washington and it is 98010. Area code: 360/564.

ZIP codes

14.92

sq mi land

1.00

sq mi water

360/564

area code

Black Diamond, WA ZIP code map

About Black Diamond, WA

Black Diamond, Washington, is a small city located in King County, known for its scenic landscapes and close-knit community. This picturesque city offers a blend of natural beauty and historical charm, making it an attractive destination for residents and visitors alike. With a rich history and a commitment to preserving its natural resources, Black Diamond continues to thrive as a vibrant part of Washington State.

Location & geography

Black Diamond is situated in the western part of Washington, approximately 30 miles southeast of Seattle, and 21 miles northeast of Tacoma. The city covers a land area of 14.92 square miles, with an additional 1.00 square mile of water, providing various outdoor recreational opportunities. The terrain is characterized by rolling hills and lush forests, with nearby lakes and rivers enhancing its scenic beauty.

Community & economy

The character of Black Diamond is marked by a friendly, family-oriented atmosphere where community involvement is highly valued. Predominantly, the local economy has historical roots in coal mining, but today, it also includes small businesses and service industries that cater to both residents and visitors. Daily life in Black Diamond is enriched by access to parks, outdoor activities, and community events that bring people together.

Transportation

Key transportation routes include State Route 169, which connects Black Diamond to neighboring cities and surrounding areas. The nearest major airport is Seattle-Tacoma International Airport, located about 30 miles away, providing access for both domestic and international travel. Public transit options are limited, but the local community encourages carpooling and biking as alternatives.

History

Black Diamond was founded in the late 1800s, primarily due to its rich coal deposits, which played a vital role in the region's development. The city was named after the Black Diamond Coal Mining Company, one of the key contributors to its early economy. Over the years, the city has transitioned away from coal mining, focusing more on preserving its natural environment and promoting community growth.

Did you know?

One surprising fact about Black Diamond is that it was once home to a thriving coal mining industry, which significantly shaped its development and culture. Today, remnants of this history can still be identified in various sites and structures throughout the city.

ZIP codes for Black Diamond, WA (1)

ZIP code	City	County	Map
98010	Black Diamond	King	View map

Demographics & statistics

6,128

Population

41.0

Median age

$141,579

Median household income

$67,391

Per capita income

$787,200

Median home value

$1,570

Median monthly rent

86.7%

Home ownership

0.8%

Poverty rate

0.9%

Unemployment

2,156

Housing units

54.3%

Bachelor's or higher

Age distribution

Male Female

230

Under 5

197

167

5–9

142

256

10–14

219

132

15–19

112

174

20–24

149

423

25–34

360

525

35–44

448

372

45–54

317

333

55–59

284

268

60–64

229

251

65–74

214

128

75–84

109

85+

← Male

Female →

Age summary

Group	Count	%
Under 18	1,426	23.3%
18 and over	4,702	76.7%
65 and over	791	12.9%
Median age	41.0 years

Race & ethnicity

White 76.3%

Two or more races 7.6%

Hispanic or Latino 7.4%

Asian 5.5%

Other race 2.6%

Black or African American 0.6%

Group	Count	%
White	5,047	76.3%
Two or more races	504	7.6%
Hispanic or Latino	489	7.4%
Asian	365	5.5%
Other race	171	2.6%
Black or African American	41	0.6%

Household income

Under $10k 1.4%

$15k–$25k 1.4%

$25k–$35k 2.1%

$35k–$50k 4.9%

$50k–$75k 5.0%

$75k–$100k 14.2%

$100k–$150k 26.0%

$150k–$200k 15.5%

$200k+ 29.5%

Range	% of households
Under $10k	1.4%
$15k–$25k	1.4%
$25k–$35k	2.1%
$35k–$50k	4.9%
$50k–$75k	5.0%
$75k–$100k	14.2%
$100k–$150k	26.0%
$150k–$200k	15.5%
$200k+	29.5%
Median income	$141,579

Housing

Home values

$100k–$150k 0.4%

$200k–$300k 2.0%

$300k–$500k 18.3%

$500k–$1M 51.0%

$1M+ 28.2%

Housing overview

Metric	Value
Median home value	$787,200
Median rent / month	$1,570
Owner occupied	86.7%
Renter occupied	13.3%
Vacant	3.9%
Single-family detached	94.0%
Large apartment buildings	0.0%
Mobile homes	5.0%
Median rooms	7.3
Avg household size (owned)	2.60

Year built

Era	%
2020 or later	7.9%
2010–2019	13.3%
2000–2009	13.6%
1990–1999	30.0%
1980–1989	5.1%
1970–1979	9.4%
1960–1969	7.1%
1950–1959	4.9%
1940–1949	0.8%
1939 or earlier	7.9%

Bedrooms

Size	% of units
No bedroom (studio)	1.0%
1 bedroom	0.8%
2 bedrooms	11.4%
3 bedrooms	40.7%
4 bedrooms	34.3%
5+ bedrooms	11.8%

Vehicles per household

Vehicles	% of households
No vehicle	0.8%
1 vehicle	16.3%
2 vehicles	42.7%
3 or more	40.2%

Heating fuel

Fuel type	%
Utility gas	67.2%
Electricity	24.9%
Propane / LP gas	2.2%
Fuel oil	1.4%
Wood	3.4%

Households & families

Household type	Count	%
Married-couple family	1,445	60.9%
Cohabiting couple	84	3.5%
Male householder, no spouse	476	20.1%
Female householder, no spouse	369	15.5%
Households with children under 18	780	32.9%
Households with seniors (65+)	525	22.1%
Average household size	2.58

Marital status

Status	Male	Female
Never married	24.6%	14.1%
Married	61.1%	66.7%
Separated	3.1%	0.0%
Widowed	1.2%	5.7%
Divorced	10.0%	13.5%

Education

Less than 9th grade 1.1%

Some HS, no diploma 0.2%

HS graduate 15.1%

Some college, no degree 19.2%

Associate's degree 10.1%

Bachelor's degree 36.3%

Graduate / professional 18.0%

Metric	%
HS diploma or higher	98.7%
Bachelor's or higher	54.3%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	102	8.1%
Kindergarten	29	2.3%
Elementary school	722	57.6%
High school	235	18.7%
College / grad school	166	13.2%

Employment

Industry of employment

Education & healthcare 23.3%

Professional & management 12.8%

Retail trade 12.3%

Construction 10.9%

Transportation & utilities 10.5%

Manufacturing 9.0%

Finance & real estate 6.9%

Public administration 4.9%

Arts, food & hospitality 4.5%

Wholesale trade 2.2%

Information 1.8%

Agriculture & mining 0.7%

Other services 0.3%

Occupation

Category	%
Management, business & arts	50.4%
Service	14.2%
Sales & office	17.2%
Natural resources & construction	9.6%
Production & transportation	8.6%

Employment type

Type	%
Private sector	75.0%
Government	18.4%
Self-employed	6.3%
Unpaid family workers	0.3%

Commute

Method	%
Drive alone	71.2%
Carpool	5.6%
Public transit	0.7%
Walk	1.0%
Other means	1.3%
Avg commute (minutes)	37.1

Poverty

All people 0.8%

Under 18 years 0.0%

18 and over 1.1%

Married-couple families 0.0%

Female-led households 0.0%

Income support

Source	% of households
Social Security	22.5%
Retirement income	23.1%
Supplemental Security	5.3%
Cash public assistance	8.2%
Food stamps / SNAP	4.5%

Health indicators

Condition	%
High blood pressure	26.5%
High cholesterol	30.7%
Heart disease	4.4%
Stroke	2.1%
Asthma	9.7%
Arthritis	20.2%
Kidney disease	2.2%
Pulmonary disease	4.2%
Cancer	6.4%

Behavior / access	%
Binge drinking	20.6%
No physical activity	12.4%
Less than 7 hrs sleep	26.5%
Fair or poor health	9.3%
Poor mental health	13.4%
Poor physical health	8.1%
No health insurance	8.3%
Visited doctor (checkup)	68.1%
Visited dentist	75.3%
Cholesterol screening	90.5%
Teeth loss	6.9%

Veterans & disability

Veterans	Count	%
Civilian veterans	494	10.5%

Disability	%
Any disability	10.2%
Under 18	3.2%
18–64 years	9.8%
65 and over	24.3%

Health insurance coverage

Type	%
Private insurance	83.7%
Public insurance	20.2%
Uninsured under 19	2.7%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	5,701	93.0%
Spanish	143	2.5%
Other Indo-European	131	2.3%
Asian & Pacific Islander	12	0.2%
Other languages	0	0.0%

Place of birth & citizenship

Origin	Count	%
Native born (US)	5,555	90.6%
Born in same state	5,546	90.5%
Born in different state	2,741	44.7%
Foreign born	9	0.1%
Naturalized citizen	573	9.4%
Not a US citizen	322	56.2%

Ancestry

Ancestry	Count	%
French	870	14.2%
Italian	819	13.4%
Polish	329	5.4%
Arab	262	4.3%

Ancestry	Count	%
English	128	2.1%
German	52	0.8%
Norwegian	8	0.1%

Technology access

Metric	% of households
Computer access	38.7%
Internet access	99.4%

Source: U.S. Census Bureau, American Community Survey 2025 estimates.

Frequently asked questions

What ZIP codes does Black Diamond, WA have?

Black Diamond, WA has one ZIP code: 98010. Each ZIP code serves a distinct delivery area within the city and surrounding region.