What city is 94520 in?

94520 is a Concord, CA mailing address. By land area, 78% lies inside Concord, 4% lies inside Bay Point and 1% lies inside Clyde; the rest is outside any Census-defined city or community.

What county is 94520 in?

94520 is in Contra Costa County.

What is the population of 94520?

About 37,381 people (±2,171), according to the Census Bureau's American Community Survey 5-year estimates for 2020–2024. The 2020 Census counted 38,383.

What is the median household income in 94520?

$82,479 (±$3,596), 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 94520?

22 USPS carrier routes with 14,012 residential and 2,773 business mailboxes (16,784 in all), from the route data stored by EDDM2GO. An EDDM mailing can target any combination of these routes.

What ZIP codes are near 94520?

The closest, measured center to center: 94519 (1.3 mi, Concord), 94518 (3 mi, Concord), 94523 (3.5 mi, Pleasant Hill), 94521 (4.5 mi, Concord), 94598 (5.4 mi, Walnut Creek) and 94597 (5.6 mi, Walnut Creek).

94520 ZIP Code, Concord, CA

94520 is a ZIP code in Concord, California in Contra Costa County. It covers 9.9 square miles of land. The closest ZIP codes are 94519, 94518 and 94523. 37,381 people live here in 13,721 households. At about 3,787 people per square mile it has suburban density, and most households rent (38% own). Median household income is $82,479, below the California median of $99,122.

Quick facts

Mailing city: Concord, CA
County: Contra Costa County
Land area: 9.9 sq mi
Population: 37,381
Median household income: $82,479
Carrier routes: 22 (14,012 homes)

Key figures

Measure	Value
Residents	37,381
Households	13,721
Median household income	$82,479
Income per person	$40,315
Median age	35
Homeowners	37.5%
Median home value	$601,000
Median rent	$2,197
Bachelor's degree or higher	29.0%
Average commute (minutes)	29.7
Households with kids under 18	33.5%
Moved in the past year	13.5%
Below the poverty line	12.2%
Broadband internet	93.2%
Speak a non-English language at home	58.2%

Household income

% of households	Value
<$10K	5.8%
$10–15K	2.6%
$15–25K	4.6%
$25–35K	5.7%
$35–50K	7.3%
$50–75K	18.4%
$75–100K	15.6%
$100–150K	17.2%
$150–200K	11.4%
$200K+	11.4%

Age

% of all residents	Value
<10	13.2%
10–19	13.3%
20–24	4.8%
25–34	18.6%
35–44	17.7%
45–54	12.2%
55–64	9.2%
65–74	6.2%
75+	4.8%

Tenure

% of housing units	Value
Owned, with mortgage	27.0%
Owned outright	9.9%
Rented	60.6%
Vacant	2.6%

Type of building

% of housing units	Value
Detached house	36.4%
Townhome	5.1%
2–4 units	5.2%
5–19 units	15.5%
20+ units	34.7%
Mobile / other	3.1%

Businesses in 94520

2,028 business establishments with 46,364 employees (ZIP Codes Business Patterns 2023).

Retail Trade: 284
Construction: 221
Health Care and Social Assistance: 221
Accommodation and Food Services: 209
Professional, Scientific, and Technical Services: 195
Other Services (except Public Administration): 174
Finance and Insurance: 142
Administrative and Support and Waste Management and Remediation Services: 132

EDDM carrier routes

94520 has 22 USPS carrier routes with 14,012 residential and 2,773 business mailboxes. Open the EDDM route map.

Carrier routes in 94520

94520 has 22 USPS carrier routes (22 city (C)) with 14,012 residential and 2,773 business mailboxes. Routes range from 269 homes (C079) to 1,313 homes (C024); the median route has 544 homes. The Census counted 13,721 households in 94520 (2020–2024 average); USPS counts current mailboxes, including new and vacant homes.

Homes per route	Routes
1–249	0
250–499	8
500–749	7
750–999	4
1,000–1,499	3
1,500+	0

Best routes in 94520 for…

Most businesses

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

Route C055 — USPS business mailboxes 406, 379 homes
Route C081 — USPS business mailboxes 302, 748 homes
Route C004 — USPS business mailboxes 210, 453 homes
Route C032 — USPS business mailboxes 207, 343 homes
Route C071 — USPS business mailboxes 199, 325 homes

Select these 5 routes on the route map

Every carrier route in 94520

Route	Type	Homes	Businesses	Est. median income	Est. owners	Est. families with kids	Est. moved in past year
C002	City	1,181	110	$108,629	—	—	—
C003	City	537	162	$83,722	—	—	—
C004	City	453	210	$71,972	—	—	—
C005	City	785	192	$83,722	—	—	—
C007	City	507	0	$80,309	—	—	—
C010	City	417	132	$71,972	—	—	—
C011	City	538	21	$121,494	—	—	—
C012	City	550	1	$137,711	—	—	—
C013	City	473	32	$62,310	—	—	—
C018	City	798	128	$64,047	—	—	—
C024	City	1,313	43	$80,309	—	—	—
C027	City	600	3	$88,282	—	—	—
C032	City	343	207	$89,596	—	—	—
C039	City	765	160	$66,422	—	—	—
C040	City	800	36	$89,596	—	—	—
C055	City	379	406	$154,998	—	—	—
C056	City	706	175	$71,972	—	—	—
C071	City	325	199	$71,972	—	—	—
C073	City	452	27	$81,826	—	—	—
C079	City	269	162	$81,826	—	—	—
C081	City	748	302	$71,972	—	—	—
C082	City	1,073	65	$71,972	—	—	—

Income, owners, families and movers are estimates for each route (how we estimate them); mailbox counts are current USPS figures. Open 94520 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

94519 — Concord city, CA (1.3 mi)
94518 — Concord city, CA (3 mi)
94523 — Pleasant Hill city, CA (3.5 mi)
94521 — Concord city, CA (4.5 mi)
94598 — Walnut Creek city, CA (5.4 mi)
94597 — Walnut Creek city, CA (5.6 mi)
94565 — Pittsburg city, CA (5.9 mi)
94553 — Martinez city, CA (6.7 mi)

Areas that include 94520

Concord, CA ZIP codes — 5 ZIP codes
Clyde, 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 94520

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) 94520, which approximates the USPS ZIP code area. Census figures: American Community Survey 5-year estimates, 2020–2024.

Frequently asked questions

What city is 94520 in?: 94520 is a Concord, CA mailing address. By land area, 78% lies inside Concord, 4% lies inside Bay Point and 1% lies inside Clyde; the rest is outside any Census-defined city or community.
What county is 94520 in?: 94520 is in Contra Costa County.
What is the population of 94520?: About 37,381 people (±2,171), according to the Census Bureau's American Community Survey 5-year estimates for 2020–2024. The 2020 Census counted 38,383.
What is the median household income in 94520?: $82,479 (±$3,596), 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 94520?: 22 USPS carrier routes with 14,012 residential and 2,773 business mailboxes (16,784 in all), from the route data stored by EDDM2GO. An EDDM mailing can target any combination of these routes.
What ZIP codes are near 94520?: The closest, measured center to center: 94519 (1.3 mi, Concord), 94518 (3 mi, Concord), 94523 (3.5 mi, Pleasant Hill), 94521 (4.5 mi, Concord), 94598 (5.4 mi, Walnut Creek) and 94597 (5.6 mi, Walnut Creek).

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