What city is 91104 in?

91104 is a Pasadena, CA mailing address. By land area, 82% lies inside Pasadena and 18% lies inside Altadena.

What county is 91104 in?

91104 is in Los Angeles County.

What is the population of 91104?

About 35,937 people (±1,963), according to the Census Bureau's American Community Survey 5-year estimates for 2020–2024. The 2020 Census counted 34,707.

What is the median household income in 91104?

$105,958 (±$7,363), 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 91104?

25 USPS carrier routes with 13,733 residential and 615 business mailboxes (14,348 in all), from the route data stored by EDDM2GO. An EDDM mailing can target any combination of these routes.

What ZIP codes are near 91104?

The closest, measured center to center: 91101 (1.5 mi, Pasadena), 91106 (1.8 mi, Pasadena), 91125 (1.9 mi, Pasadena), 91107 (2.1 mi, Pasadena), 91001 (2.2 mi, Altadena) and 91103 (2.3 mi, Pasadena).

91104 ZIP Code, Pasadena, CA

91104 is a ZIP code in Pasadena, California in Los Angeles County. It covers 3.8 square miles of land. The closest ZIP codes are 91101, 91106 and 91125. 35,937 people live here in 13,488 households. At about 9,530 people per square mile it is built up to city-neighborhood density, and owners and renters are mixed (55% own). Median household income is $105,958, close to the California median of $99,122.

Quick facts

Mailing city: Pasadena, CA
County: Los Angeles County
Land area: 3.8 sq mi
Population: 35,937
Median household income: $105,958
Carrier routes: 25 (13,733 homes)

Key figures

Measure	Value
Residents	35,937
Households	13,488
Median household income	$105,958
Income per person	$53,241
Median age	41.7
Homeowners	55.4%
Median home value	$1,080,100
Median rent	$2,063
Bachelor's degree or higher	50.0%
Average commute (minutes)	28.7
Households with kids under 18	29.3%
Moved in the past year	6.8%
Below the poverty line	12.6%
Broadband internet	93.4%
Speak a non-English language at home	45.7%

Household income

% of households	Value
<$10K	5.2%
$10–15K	2.5%
$15–25K	3.5%
$25–35K	5.1%
$35–50K	7.5%
$50–75K	10.8%
$75–100K	12.8%
$100–150K	17.9%
$150–200K	11.0%
$200K+	23.7%

Age

% of all residents	Value
<10	9.9%
10–19	12.4%
20–24	5.0%
25–34	13.0%
35–44	14.3%
45–54	15.1%
55–64	14.5%
65–74	9.7%
75+	6.2%

Tenure

% of housing units	Value
Owned, with mortgage	36.9%
Owned outright	14.9%
Rented	41.2%
Vacant	6.9%

Type of building

% of housing units	Value
Detached house	64.7%
Townhome	7.2%
2–4 units	7.3%
5–19 units	10.0%
20+ units	10.4%
Mobile / other	0.5%

Businesses in 91104

825 business establishments with 4,524 employees (ZIP Codes Business Patterns 2023).

Professional, Scientific, and Technical Services: 152
Health Care and Social Assistance: 115
Other Services (except Public Administration): 96
Arts, Entertainment, and Recreation: 74
Accommodation and Food Services: 70
Retail Trade: 65
Information: 56
Construction: 45

EDDM carrier routes

91104 has 25 USPS carrier routes with 13,733 residential and 615 business mailboxes. Open the EDDM route map.

Carrier routes in 91104

91104 has 25 USPS carrier routes (25 city (C)) with 13,733 residential and 615 business mailboxes. Routes range from 126 homes (C062) to 829 homes (C002); the median route has 549 homes. The Census counted 13,488 households in 91104 (2020–2024 average); USPS counts current mailboxes, including new and vacant homes.

Homes per route	Routes
1–249	1
250–499	7
500–749	15
750–999	2
1,000–1,499	0
1,500+	0

Best routes in 91104 for…

Most businesses

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

Route C056 — USPS business mailboxes 149, 703 homes
Route C055 — USPS business mailboxes 146, 426 homes
Route C007 — USPS business mailboxes 92, 759 homes
Route C002 — USPS business mailboxes 56, 829 homes
Route C016 — USPS business mailboxes 42, 619 homes

Select these 5 routes on the route map

Every carrier route in 91104

Route	Type	Homes	Businesses	Est. median income	Est. owners	Est. families with kids	Est. moved in past year
C002	City	829	56	$83,560	—	—	—
C004	City	620	0	$88,151	—	—	—
C005	City	607	0	$88,375	—	—	—
C006	City	549	19	$95,718	—	—	—
C007	City	759	92	$83,560	—	—	—
C008	City	722	3	$88,375	—	—	—
C016	City	619	42	$77,355	—	—	—
C020	City	557	3	$83,140	—	—	—
C038	City	461	0	$169,431	—	—	—
C039	City	587	1	$97,199	—	—	—
C042	City	567	28	$106,431	—	—	—
C044	City	444	13	$100,854	—	—	—
C045	City	656	12	$87,165	—	—	—
C046	City	351	0	$111,578	—	—	—
C047	City	470	0	$130,562	—	—	—
C048	City	518	0	$169,431	—	—	—
C050	City	485	18	$103,244	—	—	—
C051	City	544	0	$197,613	—	—	—
C052	City	543	10	$103,244	—	—	—
C054	City	442	0	$106,543	—	—	—
C055	City	426	146	$110,269	—	—	—
C056	City	703	149	$70,045	—	—	—
C060	City	619	1	$110,269	—	—	—
C061	City	529	22	$130,562	—	—	—
C062	City	126	0	$105,640	—	—	—

Income, owners, families and movers are estimates for each route (how we estimate them); mailbox counts are current USPS figures. Open 91104 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

91101 — Pasadena city, CA (1.5 mi)
91106 — Pasadena city, CA (1.8 mi)
91125 — Pasadena city, CA (1.9 mi)
91107 — Pasadena city, CA (2.1 mi)
91001 — Altadena CDP, CA (2.2 mi)
91103 — Pasadena city, CA (2.3 mi)
91105 — Pasadena city, CA (3 mi)
91108 — San Marino city, CA (3 mi)

Areas that include 91104

Pasadena, CA ZIP codes — 7 ZIP codes
Altadena, CA ZIP codes — 2 ZIP codes
Los Angeles County ZIP codes — 298 ZIP codes
California ZIP code data

Where it ranks

Mail every home in 91104

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) 91104, which approximates the USPS ZIP code area. Census figures: American Community Survey 5-year estimates, 2020–2024.

Frequently asked questions

What city is 91104 in?: 91104 is a Pasadena, CA mailing address. By land area, 82% lies inside Pasadena and 18% lies inside Altadena.
What county is 91104 in?: 91104 is in Los Angeles County.
What is the population of 91104?: About 35,937 people (±1,963), according to the Census Bureau's American Community Survey 5-year estimates for 2020–2024. The 2020 Census counted 34,707.
What is the median household income in 91104?: $105,958 (±$7,363), 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 91104?: 25 USPS carrier routes with 13,733 residential and 615 business mailboxes (14,348 in all), from the route data stored by EDDM2GO. An EDDM mailing can target any combination of these routes.
What ZIP codes are near 91104?: The closest, measured center to center: 91101 (1.5 mi, Pasadena), 91106 (1.8 mi, Pasadena), 91125 (1.9 mi, Pasadena), 91107 (2.1 mi, Pasadena), 91001 (2.2 mi, Altadena) and 91103 (2.3 mi, Pasadena).

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