94597 ZIP Code, Walnut Creek, CA

94597 is a ZIP code in Walnut Creek, California in Contra Costa County. It covers 4.1 square miles of land. The closest ZIP codes are 94523, 94549 and 94596. 23,129 people live here in 10,782 households. At about 5,707 people per square mile it is built up to city-neighborhood density, and owners and renters are mixed (46% own). Median household income is $132,063, above the California median of $99,122.

Quick facts

Key figures

MeasureValue
Residents23,129
Households10,782
Median household income$132,063
Income per person$72,923
Median age39.1
Homeowners46.4%
Median home value$1,026,800
Median rent$2,661
Bachelor's degree or higher65.1%
Average commute (minutes)32
Households with kids under 1820.6%
Moved in the past year17.4%
Below the poverty line8.1%
Broadband internet97.9%
Speak a non-English language at home34.3%

Household income

% of householdsValue
<$10K4.5%
$10–15K1.7%
$15–25K2.8%
$25–35K3.3%
$35–50K8.8%
$50–75K12.4%
$75–100K6.3%
$100–150K16.3%
$150–200K14.5%
$200K+29.4%

Age

% of all residentsValue
<1010.0%
10–198.1%
20–246.1%
25–3419.3%
35–4414.7%
45–5413.0%
55–6411.3%
65–7410.6%
75+6.9%

Tenure

% of housing unitsValue
Owned, with mortgage31.9%
Owned outright12.8%
Rented51.2%
Vacant4.1%

Type of building

% of housing unitsValue
Detached house30.2%
Townhome20.8%
2–4 units8.6%
5–19 units11.6%
20+ units28.8%
Mobile / other0.0%

Businesses in 94597

680 business establishments with 9,694 employees (ZIP Codes Business Patterns 2023).

EDDM carrier routes

94597 has 15 USPS carrier routes with 11,701 residential and 543 business mailboxes. Open the EDDM route map.

Carrier routes in 94597

94597 has 15 USPS carrier routes (15 city (C)) with 11,701 residential and 543 business mailboxes. Routes range from 454 homes (C040) to 1,808 homes (C046); the median route has 740 homes. The Census counted 10,782 households in 94597 (2020–2024 average); USPS counts current mailboxes, including new and vacant homes.

Homes per routeRoutes
1–2490
250–4993
500–7495
750–9994
1,000–1,4992
1,500+1

Best routes in 94597 for…

Most businesses

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

  1. Route C050 — USPS business mailboxes 157, 910 homes
  2. Route C048 — USPS business mailboxes 107, 498 homes
  3. Route C003 — USPS business mailboxes 84, 489 homes
  4. Route C006 — USPS business mailboxes 74, 793 homes
  5. Route C057 — USPS business mailboxes 34, 500 homes

Select these 5 routes on the route map

Every carrier route in 94597

RouteTypeHomesBusinessesEst. median incomeEst. ownersEst. families with kidsEst. moved in past year
C003City48984$179,772———
C006City79374$119,356———
C016City5870$166,703———
C018City74020$134,886———
C036City1,0133$156,132———
C037City81612$88,632———
C040City4542$134,886———
C042City1,07619$130,558———
C046City1,80811$106,175———
C047City59212$180,772———
C048City498107$180,772———
C050City910157$156,132———
C057City50034$200,001+———
C058City6424$171,425———
C063City7834$200,001+———

Income, owners, families and movers are estimates for each route (how we estimate them); mailbox counts are current USPS figures. Open 94597 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

Areas that include 94597

Where it ranks

Mail every home in 94597

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) 94597, which approximates the USPS ZIP code area. Census figures: American Community Survey 5-year estimates, 2020–2024.

Frequently asked questions

What city is 94597 in?
94597 is a Walnut Creek, CA mailing address. By land area, 73% lies inside Walnut Creek, 13% lies inside Contra Costa Centre, 11% lies inside Acalanes Ridge and 1% lies inside Lafayette.
What county is 94597 in?
94597 is in Contra Costa County.
What is the population of 94597?
About 23,129 people (±1,051), according to the Census Bureau's American Community Survey 5-year estimates for 2020–2024. The 2020 Census counted 23,661.
What is the median household income in 94597?
$132,063 (±$10,884), 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 94597?
15 USPS carrier routes with 11,701 residential and 543 business mailboxes (12,244 in all), from the route data stored by EDDM2GO. An EDDM mailing can target any combination of these routes.
What ZIP codes are near 94597?
The closest, measured center to center: 94523 (2.5 mi, Pleasant Hill), 94549 (2.8 mi, Lafayette), 94596 (2.8 mi, Walnut Creek), 94598 (3.1 mi, Walnut Creek), 94595 (3.2 mi, Walnut Creek) and 94518 (3.5 mi, Concord).

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