98038 ZIP Code — Maple Valley, WA
King County, Washington
ZIP code 98038 is located in Maple Valley, Washington, within King County. It covers approximately 65.81 square miles and serves a population of 37,877 residents. This is a standard ZIP code in the Pacific (PT) timezone, served by area code 425.
About ZIP code 98038
The housing stock consists of predominantly single-family detached homes. Most homes were built in the 2000s, giving the area an established character. Median home value is $659,000. Owner-occupancy is high at 86%, well above the national average.
Median household income is $135,304. The poverty rate of 5% is below the national average.
The dominant occupation class is management, business, and professional, with education and healthcare as the leading industry. An above-average commute of 38 minutes suggests many residents work outside the immediate area.
Educational attainment is high — 45% of residents hold a bachelor's degree or higher, well above the national average of 33%.
37,877
population
65.81
sq mi land
Standard
ZIP type
Pacific (PT)
timezone
98038 ZIP code map
Cities in ZIP code 98038
Below are the cities the US Postal Service accepts for ZIP code 98038. Using any city not on this list may result in mail delivery delays.
| City | Status |
|---|---|
| Maple Valley | Acceptable |
| Maple Valley | Preferred |
Nearby ZIP codes
98051 Ravensdale (5.2 mi)
98042 Kent (5.3 mi)
98058 Renton (5.6 mi)
98010 Black Diamond (6.2 mi)
98027 Issaquah (6.4 mi)
98059 Renton (8.5 mi)
98031 Kent (9 mi)
98092 Auburn (9.2 mi)
98030 Kent (9.4 mi)
98055 Renton (9.5 mi)
98029 Issaquah (10.8 mi)
98057 Renton (11 mi)
Demographics
updated 06/2026
| Population | |
|---|---|
| Total population | 37,877 |
| Population density | 576 / sq mi |
| State FIPS | 53 |
| County FIPS | 033 |
| Geography | |
|---|---|
| Land area | 65.81 sq mi |
| Water area | 0.35 sq mi |
| Latitude | 47.4038 |
| Longitude | -122.0059 |
| 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 | 16.9% | 24.4% | 31.7% |
| $50k – $100k | 25.2% | 25.9% | 30.6% |
| $100k – $200k | 41.6% | 30.8% | 27.1% |
| Over $200k | 16.2% | 18.9% | 10.6% |
Demographics & statistics
37,877
Population
576
People per sq mi
38.3
Median age
$135,304
Median household income
$53,372
Per capita income
$659,000
Median home value
$2,090
Median monthly rent
86.1%
Home ownership
4.8%
Poverty rate
4.5%
Unemployment
11,320
Housing units
45.3%
Bachelor's or higher
Age distribution
Male
Female
1,166
Under 5
1,130
1,620
5–9
1,571
1,898
10–14
1,841
1,497
15–19
1,452
638
20–24
619
1,820
25–34
1,766
3,395
35–44
3,293
2,672
45–54
2,591
1,254
55–59
1,217
1,113
60–64
1,080
1,409
65–74
1,366
535
75–84
519
211
85+
204
← Male
Female →
Age summary
| Group | Count | % |
|---|---|---|
| Under 18 | 11,124 | 29.4% |
| 18 and over | 26,753 | 70.6% |
| 65 and over | 4,244 | 11.2% |
| Median age | 38.3 years | |
Race & ethnicity
White
75.4%
Asian
8.8%
Two or more races
8%
Hispanic or Latino
3.9%
Black or African American
1.6%
Other race
1.4%
Native Hawaiian / Pacific Islander
0.6%
American Indian / Alaska Native
0.1%
| Group | Count | % |
|---|---|---|
| White | 29,747 | 75.4% |
| Asian | 3,488 | 8.8% |
| Two or more races | 3,173 | 8% |
| Hispanic or Latino | 1,555 | 3.9% |
| Black or African American | 636 | 1.6% |
| Other race | 553 | 1.4% |
| Native Hawaiian / Pacific Islander | 228 | 0.6% |
| American Indian / Alaska Native | 52 | 0.1% |
Household income
| Income range | This ZIP | County avg | State avg |
|---|---|---|---|
| Under $50k | 16.9% | 24.4% | 31.7% |
| $50k – $100k | 25.2% | 25.9% | 30.6% |
| $100k – $200k | 41.6% | 30.8% | 27.1% |
| Over $200k | 16.2% | 18.9% | 10.6% |
Under $10k
3.1%
$10k–$15k
1.0%
$15k–$25k
3.0%
$25k–$35k
2.0%
$35k–$50k
4.4%
$50k–$75k
10.5%
$75k–$100k
10.3%
$100k–$150k
21.1%
$150k–$200k
17.9%
$200k+
26.6%
| Range | % of households |
|---|---|
| Under $10k | 3.1% |
| $10k–$15k | 1.0% |
| $15k–$25k | 3.0% |
| $25k–$35k | 2.0% |
| $35k–$50k | 4.4% |
| $50k–$75k | 10.5% |
| $75k–$100k | 10.3% |
| $100k–$150k | 21.1% |
| $150k–$200k | 17.9% |
| $200k+ | 26.6% |
| Median income | $135,304 |
Housing
Home values
Under $50k
0.7%
$50k–$100k
0.3%
$100k–$150k
0.4%
$150k–$200k
0.1%
$200k–$300k
1.1%
$300k–$500k
21.5%
$500k–$1M
65.2%
$1M+
10.7%
Housing overview
| Metric | Value |
|---|---|
| Median home value | $659,000 |
| Median rent / month | $2,090 |
| Owner occupied | 86.1% |
| Renter occupied | 13.9% |
| Vacant | 2.2% |
| Single-family detached | 88.2% |
| Large apartment buildings | 1.7% |
| Mobile homes | 1.6% |
| Median rooms | 6.9 |
| Avg household size (owned) | 3.00 |
Year built
| Era | % |
|---|---|
| 2020 or later | 0.9% |
| 2010–2019 | 12.6% |
| 2000–2009 | 28.4% |
| 1990–1999 | 24.0% |
| 1980–1989 | 15.6% |
| 1970–1979 | 7.2% |
| 1960–1969 | 4.8% |
| 1950–1959 | 2.5% |
| 1940–1949 | 1.4% |
| 1939 or earlier | 2.6% |
Bedrooms
| Size | % of units |
|---|---|
| No bedroom (studio) | 2.0% |
| 1 bedroom | 1.3% |
| 2 bedrooms | 11.8% |
| 3 bedrooms | 40.2% |
| 4 bedrooms | 38.0% |
| 5+ bedrooms | 6.8% |
Vehicles per household
| Vehicles | % of households |
|---|---|
| No vehicle | 2.2% |
| 1 vehicle | 19.1% |
| 2 vehicles | 45.1% |
| 3 or more | 33.6% |
Heating fuel
| Fuel type | % |
|---|---|
| Utility gas | 51.0% |
| Electricity | 35.2% |
| Propane / LP gas | 5.9% |
| Fuel oil | 1.9% |
| Wood | 5.2% |
| No fuel used | 0.3% |
Households & families
| Household type | Count | % |
|---|---|---|
| Married-couple family | 8,827 | 68.9% |
| Cohabiting couple | 525 | 4.1% |
| Male householder, no spouse | 1,457 | 11.4% |
| Female householder, no spouse | 2,000 | 15.6% |
| Households with children under 18 | 5,850 | 45.7% |
| Households with seniors (65+) | 3,061 | 23.9% |
| Average household size | 2.96 | |
Marital status
| Status | Male | Female |
|---|---|---|
| Never married | 26.6% | 18.7% |
| Married | 65.5% | 63.9% |
| Separated | 0.4% | 0.2% |
| Widowed | 2.4% | 5.1% |
| Divorced | 5.1% | 12.1% |
Education
Less than 9th grade
0.7%
Some HS, no diploma
2.2%
HS graduate
18.6%
Some college, no degree
23.1%
Associate's degree
10.1%
Bachelor's degree
30.5%
Graduate / professional
14.9%
| Metric | % |
|---|---|
| HS diploma or higher | 97.1% |
| Bachelor's or higher | 45.3% |
School enrollment (ages 3–17)
| Type | Count | % |
|---|---|---|
| Nursery / preschool | 716 | 6.4% |
| Kindergarten | 560 | 5.0% |
| Elementary school | 5,588 | 49.6% |
| High school | 2,579 | 22.9% |
| College / grad school | 1,824 | 16.2% |
Employment
Industry of employment
Education & healthcare
21.0%
Professional & management
14.3%
Retail trade
12.6%
Manufacturing
10.8%
Construction
7.9%
Finance & real estate
6.6%
Arts, food & hospitality
6.4%
Public administration
6.4%
Transportation & utilities
5.2%
Wholesale trade
3.5%
Other services
2.7%
Information
1.9%
Agriculture & mining
0.7%
Occupation
| Category | % |
|---|---|
| Management, business & arts | 54.3% |
| Service | 10.1% |
| Sales & office | 19.5% |
| Natural resources & construction | 7.0% |
| Production & transportation | 9.1% |
Employment type
| Type | % |
|---|---|
| Private sector | 78.0% |
| Government | 18.9% |
| Self-employed | 3.0% |
| Unpaid family workers | 0.1% |
Commute
| Method | % |
|---|---|
| Drive alone | 72.5% |
| Carpool | 6.1% |
| Public transit | 1.8% |
| Walk | 0.7% |
| Work from home | 18.0% |
| Other means | 0.9% |
| Avg commute (minutes) | 38.1 |
Poverty
All people
4.8%
Under 18 years
7.0%
18 and over
3.9%
Married-couple families
1.2%
Female-led households
13.6%
Income support
| Source | % of households |
|---|---|
| Social Security | 23.1% |
| Retirement income | 21.6% |
| Supplemental Security | 2.3% |
| Cash public assistance | 2.0% |
| Food stamps / SNAP | 3.9% |
Health indicators
| Condition | % |
|---|---|
| Obesity | 22.5% |
| High blood pressure | 25.1% |
| High cholesterol | 29.2% |
| Diabetes | 5.9% |
| Heart disease | 3.9% |
| Stroke | 1.9% |
| Asthma | 9.6% |
| Arthritis | 18.8% |
| Kidney disease | 2.1% |
| Pulmonary disease | 3.9% |
| Cancer | 5.9% |
| Behavior / access | % |
|---|---|
| Smoking | 11.1% |
| Binge drinking | 21.0% |
| No physical activity | 12.2% |
| Less than 7 hrs sleep | 27.1% |
| Depression | 25.7% |
| Fair or poor health | 8.8% |
| Poor mental health | 13.6% |
| Poor physical health | 7.7% |
| No health insurance | 8.4% |
| Visited doctor (checkup) | 67.3% |
| Visited dentist | 75.1% |
| Cholesterol screening | 90.1% |
| Teeth loss | 6.7% |
Veterans & disability
| Veterans | Count | % |
|---|---|---|
| Civilian veterans | 2,393 | 9.0% |
| Disability | % |
|---|---|
| Any disability | 7.8% |
| Under 18 | 2.2% |
| 18–64 years | 6.5% |
| 65 and over | 28.8% |
Health insurance coverage
| Type | % |
|---|---|
| Private insurance | 88.0% |
| Public insurance | 19.6% |
| No insurance | 2.6% |
| Uninsured under 19 | 2.4% |
Language & origin
Language spoken at home (age 5+)
| Language | Count | % |
|---|---|---|
| English only | 35,581 | 93.9% |
| Spanish | 910 | 2.6% |
| Other Indo-European | 39 | 0.1% |
| Asian & Pacific Islander | 282 | 0.8% |
| Other languages | 584 | 1.6% |
Place of birth & citizenship
| Origin | Count | % |
|---|---|---|
| Native born (US) | 33,749 | 89.1% |
| Born in same state | 33,082 | 87.3% |
| Born in different state | 18,733 | 49.5% |
| Foreign born | 667 | 1.8% |
| Naturalized citizen | 4,128 | 10.9% |
| Not a US citizen | 2,187 | 53.0% |
Ancestry
| Ancestry | Count | % |
|---|---|---|
| French | 4,753 | 12.5% |
| Italian | 4,483 | 11.8% |
| Polish | 1,771 | 4.7% |
| Arab | 1,386 | 3.7% |
| English | 696 | 1.8% |
| Ancestry | Count | % |
|---|---|---|
| Dutch | 399 | 1.1% |
| German | 156 | 0.4% |
| Norwegian | 134 | 0.4% |
| Irish | 31 | 0.1% |
Technology access
| Metric | % of households |
|---|---|
| Computer access | 33.8% |
| Internet access | 97.9% |
Source: U.S. Census Bureau, American Community Survey 2025 estimates.
Frequently asked questions about ZIP code 98038
What city is ZIP code 98038 in?
ZIP code 98038 is primarily assigned to Maple Valley, Washington.
What county is ZIP code 98038 in?
ZIP code 98038 falls within King County, Washington.
Is ZIP code 98038 mostly owner-occupied?
86% of occupied units in ZIP code 98038 are owner-occupied, well above the national average.
How educated is the population of ZIP code 98038?
45% 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 98038?
The median household income in ZIP code 98038 is $135,304, above the national median of ~$75,000.
What is the typical home value in ZIP code 98038?
The median home value in ZIP code 98038 is $659,000.
What timezone is ZIP code 98038 in?
ZIP code 98038 observes the PST timezone.