What city is 94552 in?

94552 is a Castro Valley, CA mailing address. By land area, 16% lies inside Castro Valley, 13% lies inside Union City and 4% lies inside Hayward; the rest is outside any Census-defined city or community.

What is the population of 94552?

About 14,506 people (±1,268), according to the Census Bureau's American Community Survey 5-year estimates for 2020–2024. The 2020 Census counted 14,721.

What is the median household income in 94552?

$212,605 (±$21,902), 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 94552?

11 USPS carrier routes with 5,108 residential and 79 business mailboxes (5,189 in all), from the route data stored by EDDM2GO. An EDDM mailing can target any combination of these routes.

What ZIP codes are near 94552?

The closest, measured center to center: 94542 (3.6 mi, Hayward), 94583 (4.7 mi, San Ramon), 94541 (4.9 mi, Hayward), 94544 (5.7 mi, Hayward), 94546 (5.9 mi, Castro Valley) and 94568 (5.9 mi, Dublin).

94552 ZIP Code, Castro Valley, CA

94552 is a ZIP code in Castro Valley, California in Alameda County. It covers 52 square miles of land. The closest ZIP codes are 94542, 94583 and 94541. 14,506 people live here in 5,021 households. With about 280 people per square mile it is lightly settled, and most homes are owner-occupied (93%). Median household income is $212,605, well above the California median of $99,122; the median age is 48.9, older than most ZIP codes.

Quick facts

Mailing city: Castro Valley, CA
County: Alameda County
Land area: 52 sq mi
Population: 14,506
Median household income: $212,605
Carrier routes: 11 (5,108 homes)

Key figures

Measure	Value
Residents	14,506
Households	5,021
Median household income	$212,605
Income per person	$78,286
Median age	48.9
Homeowners	93.2%
Median home value	$1,394,300
Median rent	$3,197
Bachelor's degree or higher	61.0%
Average commute (minutes)	34.5
Households with kids under 18	34.9%
Moved in the past year	7.5%
Below the poverty line	6.5%
Broadband internet	98.7%
Speak a non-English language at home	43.2%

Household income

% of households	Value
<$10K	6.0%
$10–15K	1.6%
$15–25K	1.1%
$25–35K	2.6%
$35–50K	3.3%
$50–75K	3.8%
$75–100K	7.4%
$100–150K	9.7%
$150–200K	12.2%
$200K+	52.2%

Age

% of all residents	Value
<10	8.7%
10–19	13.7%
20–24	3.5%
25–34	7.2%
35–44	12.3%
45–54	13.3%
55–64	18.8%
65–74	15.4%
75+	7.1%

Tenure

% of housing units	Value
Owned, with mortgage	57.4%
Owned outright	34.6%
Rented	6.6%
Vacant	1.3%

Type of building

% of housing units	Value
Detached house	83.1%
Townhome	14.8%
2–4 units	1.1%
5–19 units	0.3%
20+ units	0.1%
Mobile / other	0.5%

Businesses in 94552

197 business establishments with 960 employees (ZIP Codes Business Patterns 2023).

Professional, Scientific, and Technical Services: 32
Real Estate and Rental and Leasing: 25
Health Care and Social Assistance: 23
Construction: 21
Other Services (except Public Administration): 18
Administrative and Support and Waste Management and Remediation Services: 14
Retail Trade: 12
Accommodation and Food Services: 12

EDDM carrier routes

94552 has 11 USPS carrier routes with 5,108 residential and 79 business mailboxes. Open the EDDM route map.

Carrier routes in 94552

94552 has 11 USPS carrier routes (10 city (C), 1 rural (R)) with 5,108 residential and 79 business mailboxes. Routes range from 185 homes (C003) to 633 homes (C020); the median route has 500 homes. The Census counted 5,021 households in 94552 (2020–2024 average); USPS counts current mailboxes, including new and vacant homes.

Homes per route	Routes
1–249	1
250–499	4
500–749	6
750–999	0
1,000–1,499	0
1,500+	0

Best routes in 94552 for…

Most businesses

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

Route C015 — USPS business mailboxes 42, 540 homes
Route R001 — USPS business mailboxes 28, 430 homes
Route C003 — USPS business mailboxes 3, 185 homes
Route C028 — USPS business mailboxes 2, 525 homes
Route C026 — USPS business mailboxes 2, 500 homes

Select these 5 routes on the route map

Every carrier route in 94552

Route	Type	Homes	Businesses	Est. median income	Est. owners	Est. families with kids	Est. moved in past year
C002	City	330	0	$186,932	—	—	—
C003	City	185	3	$186,932	—	—	—
C004	City	468	1	$200,001+	—	—	—
C013	City	533	0	$200,001+	—	—	—
C015	City	540	42	$174,888	—	—	—
C017	City	395	0	$186,932	—	—	—
C020	City	633	0	$200,001+	—	—	—
C024	City	569	1	$200,001+	—	—	—
C026	City	500	2	$174,888	—	—	—
C028	City	525	2	$200,001+	—	—	—
R001	Rural	430	28	$200,001+	—	—	—

Income, owners, families and movers are estimates for each route (how we estimate them); mailbox counts are current USPS figures. Open 94552 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

94542 — Hayward city, CA (3.6 mi)
94583 — San Ramon city, CA (4.7 mi)
94541 — Hayward city, CA (4.9 mi)
94544 — Hayward city, CA (5.7 mi)
94546 — Castro Valley CDP, CA (5.9 mi)
94568 — Dublin city, CA (5.9 mi)
94578 — San Leandro city, CA (6.4 mi)
94582 — San Ramon city, CA (6.5 mi)

Areas that include 94552

Union City, CA ZIP codes — 2 ZIP codes
Castro Valley, CA ZIP codes — 3 ZIP codes
Alameda County ZIP codes — 52 ZIP codes
California ZIP code data

Where it ranks

Mail every home in 94552

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) 94552, which approximates the USPS ZIP code area. Census figures: American Community Survey 5-year estimates, 2020–2024.

Frequently asked questions

What city is 94552 in?: 94552 is a Castro Valley, CA mailing address. By land area, 16% lies inside Castro Valley, 13% lies inside Union City and 4% lies inside Hayward; the rest is outside any Census-defined city or community.
What county is 94552 in?: 94552 is in Alameda County.
What is the population of 94552?: About 14,506 people (±1,268), according to the Census Bureau's American Community Survey 5-year estimates for 2020–2024. The 2020 Census counted 14,721.
What is the median household income in 94552?: $212,605 (±$21,902), 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 94552?: 11 USPS carrier routes with 5,108 residential and 79 business mailboxes (5,189 in all), from the route data stored by EDDM2GO. An EDDM mailing can target any combination of these routes.
What ZIP codes are near 94552?: The closest, measured center to center: 94542 (3.6 mi, Hayward), 94583 (4.7 mi, San Ramon), 94541 (4.9 mi, Hayward), 94544 (5.7 mi, Hayward), 94546 (5.9 mi, Castro Valley) and 94568 (5.9 mi, Dublin).

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