What city is 94598 in?

94598 is a Walnut Creek, CA mailing address. By land area, 38% lies inside Walnut Creek, 4% lies inside North Gate and 2% lies inside Shell Ridge; the rest is outside any Census-defined city or community.

What county is 94598 in?

94598 is in Contra Costa County.

What is the population of 94598?

About 27,206 people (±1,217), according to the Census Bureau's American Community Survey 5-year estimates for 2020–2024. The 2020 Census counted 26,826.

What is the median household income in 94598?

$186,225 (±$25,541), compared with $99,122 for California as a whole. Half the households in the ZIP code earn more and half earn less.

How many carrier routes and mailboxes are in 94598?

23 USPS carrier routes with 10,876 residential and 781 business mailboxes (11,658 in all), from the route data stored by EDDM2GO. An EDDM mailing can target any combination of these routes.

What ZIP codes are near 94598?

The closest, measured center to center: 94596 (2.3 mi, Walnut Creek), 94518 (2.4 mi, Concord), 94597 (3.1 mi, Walnut Creek), 94521 (3.5 mi, Concord), 94523 (4.2 mi, Pleasant Hill) and 94595 (4.3 mi, Walnut Creek).

94598 ZIP Code, Walnut Creek, CA

94598 is a ZIP code in Walnut Creek, California in Contra Costa County. It covers 21 square miles of land. The closest ZIP codes are 94596, 94518 and 94597. 27,206 people live here in 10,828 households. At about 1,320 people per square mile it has suburban density, and most homes are owner-occupied (76%). Median household income is $186,225, well above the California median of $99,122; the median age is 45.9, older than most ZIP codes.

Quick facts

Mailing city: Walnut Creek, CA
County: Contra Costa County
Land area: 21 sq mi
Population: 27,206
Median household income: $186,225
Carrier routes: 23 (10,876 homes)

Key figures

Measure	Value
Residents	27,206
Households	10,828
Median household income	$186,225
Income per person	$95,937
Median age	45.9
Homeowners	76.3%
Median home value	$1,339,900
Median rent	$2,940
Bachelor's degree or higher	73.7%
Average commute (minutes)	29.2
Households with kids under 18	28.7%
Moved in the past year	11.5%
Below the poverty line	5.4%
Broadband internet	96.7%
Speak a non-English language at home	29.6%

Household income

% of households	Value
<$10K	2.2%
$10–15K	2.4%
$15–25K	4.1%
$25–35K	1.0%
$35–50K	3.3%
$50–75K	4.7%
$75–100K	8.0%
$100–150K	12.6%
$150–200K	13.4%
$200K+	48.2%

Age

% of all residents	Value
<10	11.9%
10–19	8.9%
20–24	3.6%
25–34	10.0%
35–44	14.3%
45–54	13.6%
55–64	12.5%
65–74	14.1%
75+	11.1%

Tenure

% of housing units	Value
Owned, with mortgage	50.0%
Owned outright	26.0%
Rented	23.1%
Vacant	0.9%

Type of building

% of housing units	Value
Detached house	66.0%
Townhome	17.6%
2–4 units	4.2%
5–19 units	4.8%
20+ units	6.9%
Mobile / other	0.6%

Businesses in 94598

985 business establishments with 19,695 employees (ZIP Codes Business Patterns 2023).

Health Care and Social Assistance: 290
Professional, Scientific, and Technical Services: 192
Finance and Insurance: 60
Information: 53
Administrative and Support and Waste Management and Remediation Services: 53
Real Estate and Rental and Leasing: 51
Accommodation and Food Services: 50
Other Services (except Public Administration): 48

EDDM carrier routes

94598 has 23 USPS carrier routes with 10,876 residential and 781 business mailboxes. Open the EDDM route map.

Carrier routes in 94598

94598 has 23 USPS carrier routes (23 city (C)) with 10,876 residential and 781 business mailboxes. Routes range from 249 homes (C007) to 811 homes (C029); the median route has 439 homes. The Census counted 10,828 households in 94598 (2020–2024 average); USPS counts current mailboxes, including new and vacant homes.

Homes per route	Routes
1–249	1
250–499	17
500–749	3
750–999	2
1,000–1,499	0
1,500+	0

Best routes in 94598 for…

Most businesses

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

Route C038 — USPS business mailboxes 109, 292 homes
Route C016 — USPS business mailboxes 99, 422 homes
Route C007 — USPS business mailboxes 97, 249 homes
Route C031 — USPS business mailboxes 85, 477 homes
Route C013 — USPS business mailboxes 82, 287 homes

Select these 5 routes on the route map

Every carrier route in 94598

Route	Type	Homes	Businesses	Est. median income	Est. owners	Est. families with kids	Est. moved in past year
C003	City	372	0	$170,094	—	—	—
C004	City	461	1	$200,001+	—	—	—
C006	City	486	32	$200,001+	—	—	—
C007	City	249	97	$200,001+	—	—	—
C008	City	450	1	$143,701	—	—	—
C009	City	434	2	$200,001+	—	—	—
C010	City	374	25	$200,001+	—	—	—
C013	City	287	82	$200,001+	—	—	—
C014	City	794	43	$171,621	—	—	—
C015	City	473	1	$200,001+	—	—	—
C016	City	422	99	$131,656	—	—	—
C018	City	678	74	$143,701	—	—	—
C023	City	701	43	$107,263	—	—	—
C024	City	394	3	$200,001+	—	—	—
C025	City	350	22	$170,094	—	—	—
C026	City	344	2	$200,001+	—	—	—
C028	City	483	3	$143,701	—	—	—
C029	City	811	20	$164,916	—	—	—
C030	City	745	35	$170,094	—	—	—
C031	City	477	85	$200,001+	—	—	—
C032	City	360	0	$200,001+	—	—	—
C034	City	439	2	$200,001+	—	—	—
C038	City	292	109	$200,001+	—	—	—

Income, owners, families and movers are estimates for each route (how we estimate them); mailbox counts are current USPS figures. Open 94598 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

94596 — Walnut Creek city, CA (2.3 mi)
94518 — Concord city, CA (2.4 mi)
94597 — Walnut Creek city, CA (3.1 mi)
94521 — Concord city, CA (3.5 mi)
94523 — Pleasant Hill city, CA (4.2 mi)
94595 — Walnut Creek city, CA (4.3 mi)
94507 — Alamo CDP, CA (4.4 mi)
94519 — Concord city, CA (5 mi)

Areas that include 94598

Walnut Creek, CA ZIP codes — 4 ZIP codes
Contra Costa Centre, CA ZIP codes — 2 ZIP codes
North Gate, CA ZIP codes — 1 ZIP code
Shell Ridge, CA ZIP codes — 1 ZIP code
Contra Costa County ZIP codes — 47 ZIP codes
California ZIP code data

Where it ranks

Mail every home in 94598

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) 94598, which approximates the USPS ZIP code area. Census figures: American Community Survey 5-year estimates, 2020–2024.

Frequently asked questions

What city is 94598 in?: 94598 is a Walnut Creek, CA mailing address. By land area, 38% lies inside Walnut Creek, 4% lies inside North Gate and 2% lies inside Shell Ridge; the rest is outside any Census-defined city or community.
What county is 94598 in?: 94598 is in Contra Costa County.
What is the population of 94598?: About 27,206 people (±1,217), according to the Census Bureau's American Community Survey 5-year estimates for 2020–2024. The 2020 Census counted 26,826.
What is the median household income in 94598?: $186,225 (±$25,541), compared with $99,122 for California as a whole. Half the households in the ZIP code earn more and half earn less.
How many carrier routes and mailboxes are in 94598?: 23 USPS carrier routes with 10,876 residential and 781 business mailboxes (11,658 in all), from the route data stored by EDDM2GO. An EDDM mailing can target any combination of these routes.
What ZIP codes are near 94598?: The closest, measured center to center: 94596 (2.3 mi, Walnut Creek), 94518 (2.4 mi, Concord), 94597 (3.1 mi, Walnut Creek), 94521 (3.5 mi, Concord), 94523 (4.2 mi, Pleasant Hill) and 94595 (4.3 mi, Walnut Creek).

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