98027 ZIP Code — Issaquah, WA

King County, Washington

ZIP code 98027 is located in Issaquah, Washington, within King County. It covers approximately 57.18 square miles and serves a population of 27,915 residents. This is a standard ZIP code in the Pacific (PT) timezone, served by area code 425.

About ZIP code 98027

The housing stock consists of a mix of housing types. Most homes were built in the 1970s, giving the area an established character. Median home value is $912,500. Owner-occupancy sits near the national average at 69%.

The gap between median ($140,556) and mean household income suggests income inequality — a small number of higher earners pull the average up. The poverty rate of 5% is below the national average.

The dominant occupation class is management, business, and professional, with professional and management as the leading industry. The average commute of 28 minutes is near the national average. Remote work is prevalent — 28% of workers work from home.

Educational attainment is high — 65% of residents hold a bachelor's degree or higher, well above the national average of 33%.

Overall, ZIP code 98027 reflects a community defined by a highly educated population and a high rate of remote workers.

27,915

population

57.18

sq mi land

Standard

ZIP type

Pacific (PT)

timezone

98027 ZIP code map

Cities in ZIP code 98027

Below are the cities the US Postal Service accepts for ZIP code 98027. Using any city not on this list may result in mail delivery delays.

City	Status
Issaquah	Acceptable
Issaquah	Preferred

Nearby ZIP codes

98029 Issaquah (4.6 mi) 98059 Renton (5.6 mi) 98038 Maple Valley (6.4 mi) 98075 Sammamish (6.7 mi) 98058 Renton (7.2 mi) 98006 Bellevue (8.4 mi) 98008 Bellevue (9.3 mi) 98074 Sammamish (9.5 mi) 98056 Renton (9.6 mi) 98055 Renton (10.1 mi) 98051 Ravensdale (10.2 mi) 98042 Kent (10.5 mi)

Demographics updated 06/2026

Population
Total population	27,915
Population density	488 / sq mi
State FIPS	53
County FIPS	033

Geography
Land area	57.18 sq mi
Water area	0.79 sq mi
Latitude	47.4964
Longitude	-121.9909
Timezone	Pacific (PT)
Area code	425

Total population by age

Gender

Race & ethnicity

Economics updated 06/2026

Household income

Income range	This ZIP	County avg	State avg
Under $50k	17.1%	24.4%	31.7%
$50k – $100k	23.8%	25.9%	30.6%
$100k – $200k	34.4%	30.8%	27.1%
Over $200k	24.7%	18.9%	10.6%

Demographics & statistics

27,915

Population

488

People per sq mi

40.4

Median age

$140,556

Median household income

$77,106

Per capita income

$912,500

Median home value

$2,244

Median monthly rent

68.6%

Home ownership

5.2%

Poverty rate

3.8%

Unemployment

8,343

Housing units

65.1%

Bachelor's or higher

Age distribution

Male Female

635

Under 5

610

813

5–9

782

692

10–14

666

847

15–19

814

616

20–24

593

2,164

25–34

2,080

2,329

35–44

2,240

2,097

45–54

2,017

1,054

55–59

1,014

774

60–64

744

1,124

65–74

1,080

744

75–84

716

342

85+

328

← Male

Female →

Age summary

Group	Count	%
Under 18	5,262	18.9%
18 and over	22,653	81.1%
65 and over	4,334	15.5%
Median age	40.4 years

Race & ethnicity

White 67.1%

Asian 14.3%

Two or more races 7.6%

Hispanic or Latino 5.8%

Other race 3.2%

Black or African American 1.3%

Native Hawaiian / Pacific Islander 0.4%

American Indian / Alaska Native 0.3%

Group	Count	%
White	19,879	67.1%
Asian	4,240	14.3%
Two or more races	2,257	7.6%
Hispanic or Latino	1,704	5.8%
Other race	961	3.2%
Black or African American	380	1.3%
Native Hawaiian / Pacific Islander	108	0.4%
American Indian / Alaska Native	90	0.3%

Household income

Income range	This ZIP	County avg	State avg
Under $50k	17.1%	24.4%	31.7%
$50k – $100k	23.8%	25.9%	30.6%
$100k – $200k	34.4%	30.8%	27.1%
Over $200k	24.7%	18.9%	10.6%

Under $10k 3.7%

$10k–$15k 0.6%

$15k–$25k 2.7%

$25k–$35k 3.4%

$35k–$50k 3.4%

$50k–$75k 9.1%

$75k–$100k 11.0%

$100k–$150k 19.4%

$150k–$200k 13.2%

$200k+ 33.6%

Range	% of households
Under $10k	3.7%
$10k–$15k	0.6%
$15k–$25k	2.7%
$25k–$35k	3.4%
$35k–$50k	3.4%
$50k–$75k	9.1%
$75k–$100k	11.0%
$100k–$150k	19.4%
$150k–$200k	13.2%
$200k+	33.6%
Median income	$140,556

Housing

Home values

Under $50k 1.2%

$50k–$100k 0.4%

$100k–$150k 0.9%

$150k–$200k 0.2%

$200k–$300k 2.0%

$300k–$500k 7.8%

$500k–$1M 48.2%

$1M+ 39.4%

Housing overview

Metric	Value
Median home value	$912,500
Median rent / month	$2,244
Owner occupied	68.6%
Renter occupied	31.4%
Vacant	4.5%
Single-family detached	57.8%
Large apartment buildings	14.7%
Mobile homes	1.0%
Median rooms	5.9
Avg household size (owned)	2.53

Year built

Era	%
2020 or later	0.5%
2010–2019	11.7%
2000–2009	17.0%
1990–1999	15.2%
1980–1989	19.1%
1970–1979	20.3%
1960–1969	10.0%
1950–1959	2.4%
1940–1949	1.5%
1939 or earlier	2.2%

Bedrooms

Size	% of units
No bedroom (studio)	1.7%
1 bedroom	10.5%
2 bedrooms	26.6%
3 bedrooms	29.8%
4 bedrooms	24.8%
5+ bedrooms	6.5%

Vehicles per household

Vehicles	% of households
No vehicle	4.9%
1 vehicle	28.2%
2 vehicles	41.2%
3 or more	25.6%

Heating fuel

Fuel type	%
Utility gas	46.7%
Electricity	46.1%
Propane / LP gas	2.9%
Fuel oil	2.3%
Wood	1.2%
Solar	0.5%
No fuel used	0.1%

Households & families

Household type	Count	%
Married-couple family	6,585	57.9%
Cohabiting couple	828	7.3%
Male householder, no spouse	1,616	14.2%
Female householder, no spouse	2,353	20.7%
Households with children under 18	3,145	27.6%
Households with seniors (65+)	2,954	26.0%
Average household size	2.43

Marital status

Status	Male	Female
Never married	30.0%	26.4%
Married	59.3%	56.8%
Separated	0.8%	0.5%
Widowed	2.1%	6.3%
Divorced	7.8%	10.1%

Education

Less than 9th grade 1.3%

Some HS, no diploma 1.4%

HS graduate 10.2%

Some college, no degree 15.6%

Associate's degree 6.5%

Bachelor's degree 40.9%

Graduate / professional 24.2%

Metric	%
HS diploma or higher	97.3%
Bachelor's or higher	65.1%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	426	7.6%
Kindergarten	390	7.0%
Elementary school	2,177	39.1%
High school	1,549	27.8%
College / grad school	1,029	18.5%

Employment

Industry of employment

Professional & management 21.6%

Education & healthcare 19.1%

Retail trade 16.1%

Finance & real estate 7.3%

Manufacturing 7.2%

Arts, food & hospitality 7.1%

Other services 4.6%

Information 4.5%

Construction 4.0%

Transportation & utilities 3.8%

Public administration 2.9%

Wholesale trade 1.5%

Agriculture & mining 0.2%

Occupation

Category	%
Management, business & arts	60.6%
Service	10.8%
Sales & office	20.4%
Natural resources & construction	3.3%
Production & transportation	4.9%

Employment type

Type	%
Private sector	81.6%
Government	11.3%
Self-employed	6.8%
Unpaid family workers	0.3%

Commute

Method	%
Drive alone	57.4%
Carpool	6.3%
Public transit	6.0%
Walk	1.5%
Work from home	27.7%
Other means	1.1%
Avg commute (minutes)	28.3

Poverty

All people 5.2%

Under 18 years 5.7%

18 and over 5.1%

Married-couple families 2.3%

Female-led households 16.7%

Income support

Source	% of households
Social Security	24.7%
Retirement income	21.4%
Supplemental Security	1.8%
Cash public assistance	2.5%
Food stamps / SNAP	3.8%

Health indicators

Condition	%
Obesity	21.3%
High blood pressure	26.9%
High cholesterol	31.0%
Diabetes	6.6%
Heart disease	4.5%
Stroke	2.2%
Asthma	9.2%
Arthritis	20.3%
Kidney disease	2.3%
Pulmonary disease	4.1%
Cancer	6.6%

Behavior / access	%
Smoking	9.7%
Binge drinking	18.7%
No physical activity	12.5%
Less than 7 hrs sleep	25.8%
Depression	24.0%
Fair or poor health	9.2%
Poor mental health	12.4%
Poor physical health	7.8%
No health insurance	7.9%
Visited doctor (checkup)	69.1%
Visited dentist	75.4%
Cholesterol screening	90.9%
Teeth loss	6.6%

Veterans & disability

Veterans	Count	%
Civilian veterans	1,475	6.5%

Disability	%
Any disability	9.6%
Under 18	4.0%
18–64 years	6.3%
65 and over	31.2%

Health insurance coverage

Type	%
Private insurance	85.6%
Public insurance	23.0%
No insurance	2.4%
Uninsured under 19	0.8%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	26,670	95.5%
Spanish	1,514	5.7%
Other Indo-European	305	1.1%
Asian & Pacific Islander	315	1.2%
Other languages	804	3.0%

Place of birth & citizenship

Origin	Count	%
Native born (US)	22,864	81.9%
Born in same state	22,517	80.7%
Born in different state	11,528	41.3%
Foreign born	347	1.2%
Naturalized citizen	5,051	18.1%
Not a US citizen	2,497	49.4%

Ancestry

Ancestry	Count	%
French	4,110	14.7%
Italian	2,178	7.8%
Polish	1,514	5.4%
Arab	1,024	3.7%

Ancestry	Count	%
English	413	1.5%
Dutch	263	0.9%
German	210	0.8%
Irish	38	0.1%

Technology access

Metric	% of households
Computer access	40.8%
Internet access	98.0%

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

Frequently asked questions about ZIP code 98027

What city is ZIP code 98027 in?

ZIP code 98027 is primarily assigned to Issaquah, Washington.

What county is ZIP code 98027 in?

ZIP code 98027 falls within King County, Washington.

How educated is the population of ZIP code 98027?

65% of residents hold a bachelor's degree or higher — well above the national average of ~33%, reflecting a highly educated population.

What is the median household income in ZIP code 98027?

The median household income in ZIP code 98027 is $140,556, above the national median of ~$75,000.

What is the typical home value in ZIP code 98027?

The median home value in ZIP code 98027 is $912,500.

What is the population of ZIP code 98027?

ZIP code 98027 has an estimated population of 27,915 residents, with a density of 488 people per square mile.

What timezone is ZIP code 98027 in?

ZIP code 98027 observes the PST timezone.