Zip code 98040: Mercer Island, Washington

Q: What city is zip code 98040?

98040 is assigned to Mercer Island, Washington. The city name is the one the Postal Service prefers for mail addressed to this zip code.

Q: What county is 98040 in?

98040 is in King County, Washington.

Q: What is the population of 98040?

About 25,307 people live in 98040, according to the Census Bureau's American Community Survey.

Q: What is the median household income in 98040?

The median household income in 98040 is $219,069.

Q: What zip codes are near 98040?

The closest zip codes to 98040 are 98118, 98144, 98009, 98015, 98006.

Residential delivery areaKing CountyPacific Time

Population

25,307

Median household income

$219K

U.S. $81K

Median home value

$2M+

U.S. $333K

Median rent

$2,502/mo

U.S. $1,413

Median age

46.4

U.S. 38.9

Land area

6.4 sq mi

3,965 people/sq mi

Boundary is the Census Bureau's ZIP Code Tabulation Area, which closely tracks the postal delivery area.

About 98040

98040 is an urban zip code in Mercer Island, Washington (King County), covering 6.4 sq mi of land. About 25,307 people live here, or 3,965 per square mile. The median resident is 46.4 years old, compared with 38.9 nationally.

The median household earns $219,069 a year, about 2.7× the national median of $80,734. 3.8% of residents live below the poverty line (U.S.: 12.5%). The median home value is $2,000,000+. 67% of occupied homes are lived in by their owners, and renters pay a median of $2,502 a month.

81% of adults hold a bachelor's degree or higher (U.S.: 36%). Commuters average 23.6 minutes each way, and 39% of workers work from home. The most common jobs among working residents are in management, sales and healthcare. 31% of households speak a language other than English at home, most often an Asian or Pacific Island language.

How 98040 compares

Sorted from highest to lowest national percentile

Median household income$219,069
99th
StrengthU.S. $80,734 · WA $98,1416th of 541 in WA
Per capita income$128,615
99th
StrengthU.S. $44,673 · WA $53,7445th of 570 in WA
Median home value$2,000,000+
99th
U.S. $332,700 · WA $564,6003rd of 536 in WA
Bachelor's degree or higher81.4%
99th
StrengthU.S. 35.7% · WA 39.6%8th of 571 in WA
Work from home38.6%
99th
U.S. 15.1% · WA 19.8%25th of 570 in WA
Median earnings per worker$123,555
99th
StrengthU.S. $49,666 · WA $59,9599th of 566 in WA
Tech workers10.5%
97th
U.S. 3.8% · WA 6.7%45th of 570 in WA
Median gross rent$2,502
95th
U.S. $1,413 · WA $1,76018th of 475 in WA
Income inequality (Gini)0.512
92nd
WeaknessU.S. 0.483 · WA 0.46939th of 560 in WA
Median age46.4
90th
U.S. 38.9 · WA 38.3176th of 571 in WA
Self-employed workers14.4%
88th
U.S. 10% · WA 9.6%130th of 570 in WA
Residents 65 and older22.2%
84th
U.S. 17.2% · WA 16.6%203rd of 571 in WA
Foreign-born residents26.4%
83rd
U.S. 14.1% · WA 15.4%62nd of 571 in WA
Population density3,965/sq mi
75th
U.S. 95/sq mi · WA 118/sq mi80th of 571 in WA
Broadband access94.5%
71st
U.S. 91% · WA 93.6%193rd of 563 in WA
Healthcare workers11%
71st
U.S. 9.7% · WA 9.3%137th of 570 in WA
Diversity index53.2
57th
U.S. 61.4 · WA 56.5153rd of 571 in WA
Homeownership rate67%
46th
U.S. 65.2% · WA 63.8%374th of 563 in WA
Residents under 1821.5%
44th
U.S. 22% · WA 21.4%250th of 571 in WA
Population25,307
40th
U.S. 334,922,499 · WA 7,816,116137th of 571 in WA
Average commute23.6 min
34th
U.S. 26.4 min · WA 26.6 min348th of 546 in WA
Housing vacancy5.1%
34th
U.S. 10.1% · WA 7.3%376th of 563 in WA
Veterans4.6%
33rd
U.S. 6.2% · WA 7.8%468th of 571 in WA
Rent-burdened renters45.5%
31st
U.S. 51.1% · WA 49.9%293rd of 541 in WA
Government workers10.6%
23rd
U.S. 14.5% · WA 16%489th of 570 in WA
Unemployment rate3%
16th
StrengthU.S. 5.2% · WA 5.1%417th of 570 in WA
Poverty rate3.8%
5th
StrengthU.S. 12.5% · WA 9.9%506th of 563 in WA
Uninsured rate1.2%
2nd
StrengthU.S. 8.4% · WA 6.3%522nd of 567 in WA

Measure	98040	King	WA	U.S.	National percentile	Rank in WA
Median household incomeStrength	$219,069	$124,746	$98,141	$80,734	99th	6th of 541
Per capita incomeStrength	$128,615	$74,100	$53,744	$44,673	99th	5th of 570
Median home value	$2,000,000+	$859,900	$564,600	$332,700	99th	3rd of 536
Bachelor's degree or higherStrength	81.4%	56.7%	39.6%	35.7%	99th	8th of 571
Work from home	38.6%	29.2%	19.8%	15.1%	99th	25th of 570
Median earnings per workerStrength	$123,555	$76,012	$59,959	$49,666	99th	9th of 566
Tech workers	10.5%	12.8%	6.7%	3.8%	97th	45th of 570
Median gross rent	$2,502	$2,092	$1,760	$1,413	95th	18th of 475
Income inequality (Gini)Weakness	0.512	0.483	0.469	0.483	92nd	39th of 560
Median age	46.4	37.4	38.3	38.9	90th	176th of 571
Self-employed workers	14.4%	9.4%	9.6%	10%	88th	130th of 570
Residents 65 and older	22.2%	14%	16.6%	17.2%	84th	203rd of 571
Foreign-born residents	26.4%	25.8%	15.4%	14.1%	83rd	62nd of 571
Population density	3,965/sq mi	1,081/sq mi	118/sq mi	95/sq mi	75th	80th of 571
Broadband access	94.5%	95.1%	93.6%	91%	71st	193rd of 563
Healthcare workers	11%	8.2%	9.3%	9.7%	71st	137th of 570
Diversity index	53.2	65.6	56.5	61.4	57th	153rd of 571
Homeownership rate	67%	55.4%	63.8%	65.2%	46th	374th of 563
Residents under 18	21.5%	19.5%	21.4%	22%	44th	250th of 571
Population	25,307	2,287,171	7,816,116	334,922,499	40th	137th of 571
Average commute	23.6 min	27.6 min	26.6 min	26.4 min	34th	348th of 546
Housing vacancy	5.1%	6.2%	7.3%	10.1%	34th	376th of 563
Veterans	4.6%	4.5%	7.8%	6.2%	33rd	468th of 571
Rent-burdened renters	45.5%	46.8%	49.9%	51.1%	31st	293rd of 541
Government workers	10.6%	11.7%	16%	14.5%	23rd	489th of 570
Unemployment rateStrength	3%	4.8%	5.1%	5.2%	16th	417th of 570
Poverty rateStrength	3.8%	8.6%	9.9%	12.5%	5th	506th of 563
Uninsured rateStrength	1.2%	5.2%	6.3%	8.4%	2nd	522nd of 567

The percentile is the share of Americans who live in a zip code with a lower value, so the 50th percentile is typical. Rank 1 is the highest value in the state. Both include zip codes with at least 100 residents. Strengths and weaknesses mark measures in the best or worst fifth nationally, where higher or lower is clearly better (income, poverty, education, commute, broadband, insurance and similar). Measures like age or density are left unmarked.

People

Age

Under 5

18%

5–17

18–24

25–34

12%

35–44

16%

45–54

14%

55–64

11%

65–74

12%

75+

Median age

46.4

Under 18

21.5%

65 and over

22.2%

Race and ethnicity

White63%
Black0.9%
Hispanic2%
Asian24%
Native American0%
Pacific Islander0%
Other0.6%
Multiracial8%

Diversity index

53.2

U.S. 61.4

Foreign-born

26.4%

U.S. 14.1%

Born in state

33.9%

Language spoken at home (households)

English only

69%

Spanish

Other Indo-European

10%

Asian / Pacific

18%

Other

0.8%

Households

Households: 10,068
Average household size: 2.5
Family households: 69.8%
Married couples: 63.4%
Living alone: 24%
Veterans (of adults): 4.6%
Male / female: 48% / 52%

Income and poverty

Household income distribution

<$25k

$25–50k

$50–75k

$75–100k

$100–150k

$150–200k

10%

$200k+

54%

Median household income

98040

$219,069

King Co.

$124,746

Washington

$98,141

United States

$80,734

Per capita income

$128,615

U.S. $44,673

Poverty rate

3.8%

U.S. 12.5%

Households earning $150K+

63.3%

U.S. 23%

Income inequality (Gini)

0.512

U.S. 0.483

Housing

Median home value

98040

$2,000,000+

King Co.

$859,900

Washington

$564,600

United States

$332,700

Median gross rent

98040

$2,502

King Co.

$2,092

Washington

$1,760

United States

$1,413

Types of housing

Single-family

67%

2–4 units

0.8%

5–19 units

20+ units

24%

Mobile home

0.7%

Boat, RV, van

Housing units: 10,609
Owner-occupied: 67%
Vacant: 5.1%
Median year built: 1973
Median rooms: 7
Renters paying 30%+ of income: 45.5%
Renters paying 50%+ of income: 27.1%
Home value to income: 9.1× (U.S. 4.1×)

Work and commute

How people get to work

Drove alone

52%

Carpooled

Transit

Walked

Bicycle

0.1%

Worked from home

39%

Other

Commute time (one way)

<10 min

11%

10–19

24%

20–29

33%

30–44

23%

45–59

60+

Average commute

23.6 min

U.S. 26.4 min

Unemployment

U.S. 5.2%

In labor force

60.3%

U.S. 63.5%

Jobs and careers

What employed residents do, wherever they work

Occupations

Management

22%

Sales

11%

Healthcare

11%

Computer and math

10%

Business and finance

10%

Education

Engineering and science

Legal and social services

Office and admin

Arts, media and sports

Cleaning and personal care

Food service

Transportation and moving

Construction and repair

Police and fire

0.6%

Production

0.3%

Farming, fishing and forestry

Industries

Professional and technical services

25%

Health care and social assistance

13%

Finance, insurance and real estate

12%

Education

10%

Retail

Information

Manufacturing

Other services

Restaurants and hotels

Transportation, warehousing and utilities

Arts and recreation

Admin, support and management

Public administration

Construction

Wholesale

Agriculture and mining

0.3%

Median earnings per worker

$123,555

U.S. $49,666

Self-employed

14.4%

U.S. 10%

Government workers

10.6%

U.S. 14.5%

Nonprofit workers

9.3%

U.S. 8.8%

Median earnings by type of work

Type of work	98040	U.S.
Management, business, science and arts	$152,803	$74,888
Service	$16,339	$26,804
Sales and office	$86,944	$40,476
Construction and maintenance	$54,667	$49,199
Production and transportation	$37,647	$39,989

Education, internet and health coverage

Highest education (adults 25+)

No diploma

High school

Some college

Associate's

Bachelor's

37%

Graduate

45%

High school graduate or higher: 98.4%
Bachelor's degree or higher: 81.4%
Graduate or professional degree: 44.7%
Households with broadband: 94.5%
Cable, fiber or DSL: 85.7%
No internet access: 3%
Without health insurance: 1.2%
Limited-English households: 3.9%

Geography

City (USPS): Mercer Island
State: Washington
County: King County
Center point: 47.5640° N, 122.2312° W
Land area: 6.4 sq mi
Water area: 6.5 sq mi
Time zone: Pacific Time (UTC-8, UTC-7 in summer)
Zip type: Residential delivery area

Cities and towns within this zip

Mercer Island100% of zip

Census places overlapping the zip's area. Mail may use a different city name than the municipality.

Zip codes near 98040

Search by radius

Zip	City	Distance	Population	IncomeMedian income	Home value
98118	Seattle, WA	2.3 mi	50,500	$113,762	$810,500
98144	Seattle, WA	3.2 mi	33,787	$96,969	$901,700
98009	Bellevue, WA · PO box	3.5 mi	—	—	—
98015	Bellevue, WA · PO box	3.5 mi	—	—	—
98006	Bellevue, WA	3.8 mi	40,009	$198,150	$1,388,500
98004	Bellevue, WA	3.9 mi	39,897	$182,545	$2,000,000+
98108	Seattle, WA	4 mi	25,529	$95,780	$720,400
98056	Renton, WA	4.1 mi	35,849	$113,688	$797,300
98122	Seattle, WA	4.3 mi	43,234	$106,886	$957,100
98005	Bellevue, WA	4.5 mi	21,846	$160,849	$1,519,500
98178	Seattle, WA	4.6 mi	26,748	$99,505	$660,400
98039	Medina, WA	4.9 mi	2,928	$250,000+	$2,000,000+

Zip codes like 98040 elsewhere

Matched on income, home values, age, density, education, housing and commuting

Questions about 98040

What city is zip code 98040?

98040 is assigned to Mercer Island, Washington. The city name is the one the Postal Service prefers for mail addressed to this zip code.

What county is 98040 in?

98040 is in King County, Washington.

What is the population of 98040?

About 25,307 people live in 98040, according to the Census Bureau's American Community Survey.

What time zone is 98040 in?

98040 is in Pacific Time.

What is the median household income in 98040?

The median household income in 98040 is $219,069.

What zip codes are near 98040?

The closest zip codes to 98040 are 98118, 98144, 98009, 98015, 98006.

Demographic figures are 2020–2024 American Community Survey 5-year estimates for ZIP Code Tabulation Area 98040, from the U.S. Census Bureau. Small areas have wide margins of error. How we build these numbers.