What city is 94402 in?

94402 is a San Mateo, CA mailing address. By land area, 60% lies inside San Mateo, 26% lies inside Highlands and 11% lies inside Baywood Park; the rest is outside any Census-defined city or community.

What is the population of 94402?

About 25,475 people (±1,413), according to the Census Bureau's American Community Survey 5-year estimates for 2020–2024. The 2020 Census counted 25,879.

What is the median household income in 94402?

$172,522 (±$19,726), 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 94402?

26 USPS carrier routes with 10,696 residential and 1,003 business mailboxes (11,700 in all), from the route data stored by EDDM2GO. An EDDM mailing can target any combination of these routes.

What ZIP codes are near 94402?

The closest, measured center to center: 94403 (1.4 mi, San Mateo), 94401 (2.5 mi, San Mateo), 94002 (2.6 mi, Belmont), 94010 (3.3 mi, Hillsborough), 94404 (3.6 mi, Foster City) and 94065 (4.4 mi, Redwood City).

94402 ZIP Code, San Mateo, CA

94402 is a ZIP code in San Mateo, California in San Mateo County. It covers 5.0 square miles of land. The closest ZIP codes are 94403, 94401 and 94002. 25,475 people live here in 10,125 households. At about 5,045 people per square mile it is built up to city-neighborhood density, and owners and renters are mixed (58% own). Median household income is $172,522, well above the California median of $99,122.

Quick facts

Mailing city: San Mateo, CA
County: San Mateo County
Land area: 5.0 sq mi
Population: 25,475
Median household income: $172,522
Carrier routes: 26 (10,696 homes)

Key figures

Measure	Value
Residents	25,475
Households	10,125
Median household income	$172,522
Income per person	$109,498
Median age	40.8
Homeowners	58.4%
Median home value	$2,000,000+
Median rent	$3,501
Bachelor's degree or higher	68.6%
Average commute (minutes)	26.2
Households with kids under 18	29.8%
Moved in the past year	13.4%
Below the poverty line	5.2%
Broadband internet	95.5%
Speak a non-English language at home	34.1%

Household income

% of households	Value
<$10K	2.7%
$10–15K	0.8%
$15–25K	1.2%
$25–35K	3.0%
$35–50K	5.0%
$50–75K	7.3%
$75–100K	8.4%
$100–150K	15.5%
$150–200K	9.8%
$200K+	46.3%

Age

% of all residents	Value
<10	11.5%
10–19	12.0%
20–24	3.9%
25–34	14.3%
35–44	13.6%
45–54	13.3%
55–64	11.7%
65–74	9.8%
75+	10.1%

Tenure

% of housing units	Value
Owned, with mortgage	37.1%
Owned outright	18.1%
Rented	38.9%
Vacant	5.9%

Type of building

% of housing units	Value
Detached house	60.1%
Townhome	5.9%
2–4 units	6.0%
5–19 units	10.1%
20+ units	17.8%
Mobile / other	0.0%

Businesses in 94402

1,024 business establishments with 24,824 employees (ZIP Codes Business Patterns 2023).

Professional, Scientific, and Technical Services: 263
Health Care and Social Assistance: 119
Finance and Insurance: 102
Construction: 79
Other Services (except Public Administration): 76
Information: 64
Real Estate and Rental and Leasing: 64
Administrative and Support and Waste Management and Remediation Services: 60

EDDM carrier routes

94402 has 26 USPS carrier routes with 10,696 residential and 1,003 business mailboxes. Open the EDDM route map.

Carrier routes in 94402

94402 has 26 USPS carrier routes (26 city (C)) with 10,696 residential and 1,003 business mailboxes. Routes range from 276 homes (C032) to 963 homes (C034); the median route has 373 homes. The Census counted 10,125 households in 94402 (2020–2024 average); USPS counts current mailboxes, including new and vacant homes.

Homes per route	Routes
1–249	0
250–499	22
500–749	3
750–999	1
1,000–1,499	0
1,500+	0

Best routes in 94402 for…

Most businesses

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

Route C021 — USPS business mailboxes 210, 305 homes
Route C002 — USPS business mailboxes 186, 361 homes
Route C034 — USPS business mailboxes 121, 963 homes
Route C020 — USPS business mailboxes 112, 300 homes
Route C024 — USPS business mailboxes 93, 391 homes

Select these 5 routes on the route map

Every carrier route in 94402

Route	Type	Homes	Businesses	Est. median income	Est. owners	Est. families with kids	Est. moved in past year
C001	City	305	0	$200,001+	—	—	—
C002	City	361	186	$103,097	—	—	—
C004	City	451	2	$200,001+	—	—	—
C005	City	374	4	$200,001+	—	—	—
C006	City	419	1	$200,001+	—	—	—
C009	City	548	16	$175,237	—	—	—
C010	City	491	41	$200,001+	—	—	—
C012	City	329	0	$200,001+	—	—	—
C013	City	370	4	$197,817	—	—	—
C014	City	544	2	$167,167	—	—	—
C015	City	384	31	$200,001+	—	—	—
C016	City	352	1	$200,001+	—	—	—
C020	City	300	112	$167,167	—	—	—
C021	City	305	210	$167,167	—	—	—
C022	City	314	23	$200,001+	—	—	—
C023	City	391	2	$199,209	—	—	—
C024	City	391	93	$190,102	—	—	—
C026	City	327	1	$200,001+	—	—	—
C027	City	319	15	$200,001+	—	—	—
C028	City	455	0	$153,472	—	—	—
C030	City	591	55	$184,393	—	—	—
C031	City	461	37	$155,179	—	—	—
C032	City	276	0	$199,209	—	—	—
C034	City	963	121	$94,690	—	—	—
C041	City	304	29	$200,001+	—	—	—
C042	City	371	17	$175,237	—	—	—

Income, owners, families and movers are estimates for each route (how we estimate them); mailbox counts are current USPS figures. Open 94402 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

94403 — San Mateo city, CA (1.4 mi)
94401 — San Mateo city, CA (2.5 mi)
94002 — Belmont city, CA (2.6 mi)
94010 — Hillsborough town, CA (3.3 mi)
94404 — Foster City city, CA (3.6 mi)
94065 — Redwood City city, CA (4.4 mi)
94070 — San Carlos city, CA (4.4 mi)
94030 — Millbrae city, CA (5.7 mi)

Areas that include 94402

San Mateo, CA ZIP codes — 4 ZIP codes
Highlands, CA ZIP codes — 1 ZIP code
Baywood Park, CA ZIP codes — 1 ZIP code
San Mateo County ZIP codes — 31 ZIP codes
California ZIP code data

Where it ranks

Mail every home in 94402

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) 94402, which approximates the USPS ZIP code area. Census figures: American Community Survey 5-year estimates, 2020–2024.

Frequently asked questions

What city is 94402 in?: 94402 is a San Mateo, CA mailing address. By land area, 60% lies inside San Mateo, 26% lies inside Highlands and 11% lies inside Baywood Park; the rest is outside any Census-defined city or community.
What county is 94402 in?: 94402 is in San Mateo County.
What is the population of 94402?: About 25,475 people (±1,413), according to the Census Bureau's American Community Survey 5-year estimates for 2020–2024. The 2020 Census counted 25,879.
What is the median household income in 94402?: $172,522 (±$19,726), 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 94402?: 26 USPS carrier routes with 10,696 residential and 1,003 business mailboxes (11,700 in all), from the route data stored by EDDM2GO. An EDDM mailing can target any combination of these routes.
What ZIP codes are near 94402?: The closest, measured center to center: 94403 (1.4 mi, San Mateo), 94401 (2.5 mi, San Mateo), 94002 (2.6 mi, Belmont), 94010 (3.3 mi, Hillsborough), 94404 (3.6 mi, Foster City) and 94065 (4.4 mi, Redwood City).

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