What city is 98038 in?

98038 is a Maple Valley, WA mailing address. By land area, 26% lies inside Hobart, 9% lies inside Maple Valley, 5% lies inside Shadow Lake and 4% lies inside East Renton Highlands; the rest is outside any Census-defined city or community.

What is the population of 98038?

About 37,324 people (±865), according to the Census Bureau's American Community Survey 5-year estimates for 2020–2024. The 2020 Census counted 37,487.

What is the median household income in 98038?

$152,261 (±$11,389), compared with $98,141 for Washington as a whole. Half the households in the ZIP code earn more and half earn less.

How many carrier routes and mailboxes are in 98038?

21 USPS carrier routes with 13,215 residential and 379 business mailboxes (13,594 in all), from the route data stored by EDDM2GO. An EDDM mailing can target any combination of these routes.

What ZIP codes are near 98038?

The closest, measured center to center: 98025 (1.1 mi), 98051 (6.2 mi, Ravensdale), 98027 (6.7 mi, Mirrormont), 98010 (7.4 mi, Black Diamond), 98058 (8 mi, Fairwood) and 98042 (8.4 mi, Lake Morton-Berrydale).

98038 ZIP Code, Maple Valley, WA

98038 is a ZIP code in Maple Valley, Washington in King County. It covers 66 square miles of land. The closest ZIP codes are 98025, 98051 and 98027. 37,324 people live here in 12,618 households. With about 567 people per square mile it is lightly settled, and most homes are owner-occupied (86%). Median household income is $152,261, well above the Washington median of $98,141; 46% of households have children under 18.

Quick facts

Mailing city: Maple Valley, WA
County: King County
Land area: 66 sq mi
Population: 37,324
Median household income: $152,261
Carrier routes: 21 (13,215 homes)

Key figures

Measure	Value
Residents	37,324
Households	12,618
Median household income	$152,261
Income per person	$57,730
Median age	38.5
Homeowners	85.6%
Median home value	$776,900
Median rent	$2,316
Bachelor's degree or higher	49.0%
Average commute (minutes)	36.5
Households with kids under 18	45.6%
Moved in the past year	12.1%
Below the poverty line	5.2%
Broadband internet	96.1%
Speak a non-English language at home	16.7%

Household income

% of households	Value
<$10K	2.0%
$10–15K	1.0%
$15–25K	3.7%
$25–35K	2.1%
$35–50K	3.6%
$50–75K	8.7%
$75–100K	10.2%
$100–150K	18.0%
$150–200K	18.8%
$200K+	31.9%

Age

% of all residents	Value
<10	13.8%
10–19	18.0%
20–24	3.3%
25–34	9.1%
35–44	17.5%
45–54	14.7%
55–64	11.8%
65–74	7.5%
75+	4.5%

Tenure

% of housing units	Value
Owned, with mortgage	64.2%
Owned outright	19.5%
Rented	13.9%
Vacant	2.4%

Type of building

% of housing units	Value
Detached house	86.3%
Townhome	3.6%
2–4 units	1.7%
5–19 units	4.4%
20+ units	1.9%
Mobile / other	2.0%

Businesses in 98038

752 business establishments with 6,029 employees (ZIP Codes Business Patterns 2023).

Construction: 153
Health Care and Social Assistance: 89
Professional, Scientific, and Technical Services: 82
Other Services (except Public Administration): 71
Accommodation and Food Services: 60
Retail Trade: 57
Administrative and Support and Waste Management and Remediation Services: 52
Real Estate and Rental and Leasing: 36

EDDM carrier routes

98038 has 21 USPS carrier routes with 13,215 residential and 379 business mailboxes. Open the EDDM route map.

Carrier routes in 98038

98038 has 21 USPS carrier routes (21 rural (R)) with 13,215 residential and 379 business mailboxes. Routes range from 241 homes (R036) to 821 homes (R032); the median route has 629 homes. The Census counted 12,618 households in 98038 (2020–2024 average); USPS counts current mailboxes, including new and vacant homes.

Homes per route	Routes
1–249	1
250–499	1
500–749	15
750–999	4
1,000–1,499	0
1,500+	0

Best routes in 98038 for…

Most businesses

For B2B offers: office supplies, cleaning, IT, catering and commercial services.

Route R035 — USPS business mailboxes 109, 603 homes
Route R026 — USPS business mailboxes 102, 756 homes
Route R034 — USPS business mailboxes 60, 615 homes
Route R020 — USPS business mailboxes 45, 755 homes
Route R014 — USPS business mailboxes 24, 629 homes

Select these 5 routes on the route map

Every carrier route in 98038

Route	Type	Homes	Businesses	Est. median income	Est. owners	Est. families with kids	Est. moved in past year
R014	Rural	629	24	$124,503	—	—	—
R016	Rural	646	1	$151,104	—	—	—
R017	Rural	757	10	$102,275	—	—	—
R018	Rural	672	0	$153,083	—	—	—
R020	Rural	755	45	$123,421	—	—	—
R021	Rural	567	7	$189,016	—	—	—
R022	Rural	546	3	$189,016	—	—	—
R023	Rural	532	1	$154,898	—	—	—
R024	Rural	715	1	$124,929	—	—	—
R025	Rural	536	9	$167,638	—	—	—
R026	Rural	756	102	$169,972	—	—	—
R027	Rural	602	3	$172,236	—	—	—
R028	Rural	479	0	$167,638	—	—	—
R029	Rural	672	0	$157,860	—	—	—
R030	Rural	725	0	$123,421	—	—	—
R031	Rural	744	0	$200,001+	—	—	—
R032	Rural	821	4	$41,264	—	—	—
R033	Rural	602	0	$123,421	—	—	—
R034	Rural	615	60	$94,625	—	—	—
R035	Rural	603	109	$124,929	—	—	—
R036	Rural	241	0	$123,421	—	—	—

Income, owners, families and movers are estimates for each route (how we estimate them); mailbox counts are current USPS figures. Open 98038 on the EDDM route map.

How route demographics are estimated

Mailbox counts come from USPS; demographics are estimates

The number of homes and businesses on each carrier route is the current USPS EDDM count. The Census Bureau does not publish figures for carrier routes, so income, homeownership, ages, families, movers and housing age on a route are EDDM2GO estimates built from Census block groups (neighborhood areas of roughly 600 to 3,000 people).

How a route gets its figures: the block-group length-share method

We trace each route's streets every 25 meters and record which block group each stretch falls in. The route's homes are spread along its streets in proportion to length, so a route with 60% of its street length in one block group is assumed to have 60% of its homes there. Each block group then contributes its Census counts in proportion to the share of its housing units that sit on the route (capped at the whole block group). Medians are recalculated from the combined income, home-value and age brackets, the way the Census Bureau computes them, not averaged.

Margins of error

Census survey figures carry a margin of error at 90% confidence; we carry it through the calculation and show it as ±. Our margins treat the route-to-block-group split as exact, so the real uncertainty is larger. Routes with fewer than 100 estimated households, large margins, or streets we could not place are flagged.

Different years

USPS mailbox counts are current. Census figures are 5-year averages for 2020–2024, so a new subdivision may have more homes on the route today than the Census counted. Use the route figures to compare routes with each other, not as an exact head count.

Why some routes show identical figures

Two routes that run through the same block group get the same percentages and medians, because the Census publishes one set of figures for the whole block group. Their mailbox counts still differ, and those are exact.

Route and mailbox counts: USPS EDDM route data. Route demographics: EDDM2GO estimates from U.S. Census Bureau American Community Survey 5-year block-group data (2020–2024) and 2024 cartographic block-group boundaries. This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.

Nearby ZIP codes

98025 (1.1 mi)
98051 — Ravensdale CDP, WA (6.2 mi)
98027 — Mirrormont CDP, WA (6.7 mi)
98010 — Black Diamond city, WA (7.4 mi)
98058 — Fairwood CDP, WA (8 mi)
98042 — Lake Morton-Berrydale CDP, WA (8.4 mi)
98050 (8.9 mi)
98059 — East Renton Highlands CDP, WA (9.6 mi)

Areas that include 98038

Maple Valley, WA ZIP codes — 1 ZIP code
East Renton Highlands, WA ZIP codes — 3 ZIP codes
Hobart, WA ZIP codes — 2 ZIP codes
Mirrormont, WA ZIP codes — 2 ZIP codes
Shadow Lake, WA ZIP codes — 3 ZIP codes
King County ZIP codes — 88 ZIP codes
Washington ZIP code data

Where it ranks

Mail every home in 98038

Route counts on this page price as Full Service 6.5 × 9 postcards: we print, bundle by carrier route and hand the mailing to USPS. Prefer to take it to the Post Office yourself? Print only costs less and you pay postage at drop-off.

EDDM guides

ZIP code statistics describe the Census ZIP Code Tabulation Area (ZCTA) 98038, which approximates the USPS ZIP code area. Census figures: American Community Survey 5-year estimates, 2020–2024.

Frequently asked questions

What city is 98038 in?: 98038 is a Maple Valley, WA mailing address. By land area, 26% lies inside Hobart, 9% lies inside Maple Valley, 5% lies inside Shadow Lake and 4% lies inside East Renton Highlands; the rest is outside any Census-defined city or community.
What county is 98038 in?: 98038 is in King County.
What is the population of 98038?: About 37,324 people (±865), according to the Census Bureau's American Community Survey 5-year estimates for 2020–2024. The 2020 Census counted 37,487.
What is the median household income in 98038?: $152,261 (±$11,389), compared with $98,141 for Washington as a whole. Half the households in the ZIP code earn more and half earn less.
How many carrier routes and mailboxes are in 98038?: 21 USPS carrier routes with 13,215 residential and 379 business mailboxes (13,594 in all), from the route data stored by EDDM2GO. An EDDM mailing can target any combination of these routes.
What ZIP codes are near 98038?: The closest, measured center to center: 98025 (1.1 mi), 98051 (6.2 mi, Ravensdale), 98027 (6.7 mi, Mirrormont), 98010 (7.4 mi, Black Diamond), 98058 (8 mi, Fairwood) and 98042 (8.4 mi, Lake Morton-Berrydale).

This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.