91103 ZIP Code, Pasadena, CA
91103 is a ZIP code in Pasadena, California in Los Angeles County. It covers 4.6 square miles of land. The closest ZIP codes are 91105, 91101 and 91104. 25,142 people live here in 8,694 households. At about 5,479 people per square mile it is built up to city-neighborhood density, and owners and renters are mixed (47% own). Median household income is $93,660, close to the California median of $99,122.
Quick facts
- Mailing city: Pasadena, CA
- County: Los Angeles County
- Land area: 4.6 sq mi
- Population: 25,142
- Median household income: $93,660
- Carrier routes: 16 (9,939 homes)
Key figures
| Measure | Value |
|---|---|
| Residents | 25,142 |
| Households | 8,694 |
| Median household income | $93,660 |
| Income per person | $52,783 |
| Median age | 39.9 |
| Homeowners | 47.0% |
| Median home value | $983,300 |
| Median rent | $2,085 |
| Bachelor's degree or higher | 39.3% |
| Average commute (minutes) | 27.3 |
| Households with kids under 18 | 28.7% |
| Moved in the past year | 12.4% |
| Below the poverty line | 17.5% |
| Broadband internet | 92.3% |
| Speak a non-English language at home | 48.9% |
Household income
| % of households | Value |
|---|---|
| <$10K | 5.2% |
| $10–15K | 5.2% |
| $15–25K | 7.7% |
| $25–35K | 5.3% |
| $35–50K | 7.9% |
| $50–75K | 10.5% |
| $75–100K | 11.9% |
| $100–150K | 12.5% |
| $150–200K | 10.6% |
| $200K+ | 23.2% |
Age
| % of all residents | Value |
|---|---|
| <10 | 9.9% |
| 10–19 | 11.4% |
| 20–24 | 5.7% |
| 25–34 | 15.8% |
| 35–44 | 16.0% |
| 45–54 | 11.6% |
| 55–64 | 12.8% |
| 65–74 | 8.6% |
| 75+ | 8.4% |
Tenure
| % of housing units | Value |
|---|---|
| Owned, with mortgage | 30.0% |
| Owned outright | 12.1% |
| Rented | 46.8% |
| Vacant | 11.0% |
Type of building
| % of housing units | Value |
|---|---|
| Detached house | 55.5% |
| Townhome | 5.0% |
| 2–4 units | 10.2% |
| 5–19 units | 13.9% |
| 20+ units | 15.3% |
| Mobile / other | 0.1% |
Businesses in 91103
724 business establishments with 12,808 employees (ZIP Codes Business Patterns 2023).
- Professional, Scientific, and Technical Services: 146
- Health Care and Social Assistance: 95
- Accommodation and Food Services: 84
- Retail Trade: 53
- Real Estate and Rental and Leasing: 50
- Other Services (except Public Administration): 50
- Arts, Entertainment, and Recreation: 48
- Information: 33
EDDM carrier routes
91103 has 16 USPS carrier routes with 9,939 residential and 802 business mailboxes. Open the EDDM route map.
Carrier routes in 91103
91103 has 16 USPS carrier routes (16 city (C)) with 9,939 residential and 802 business mailboxes. Routes range from 78 homes (C034) to 1,302 homes (C002); the median route has 617 homes. The Census counted 8,694 households in 91103 (2020–2024 average); USPS counts current mailboxes, including new and vacant homes.
| Homes per route | Routes |
|---|---|
| 1–249 | 1 |
| 250–499 | 5 |
| 500–749 | 6 |
| 750–999 | 3 |
| 1,000–1,499 | 1 |
| 1,500+ | 0 |
Best routes in 91103 for…
Most businesses
For B2B offers: office supplies, cleaning, IT, catering and commercial services.
- Route C018 — USPS business mailboxes 299, 313 homes
- Route C002 — USPS business mailboxes 163, 1,302 homes
- Route C026 — USPS business mailboxes 96, 557 homes
- Route C010 — USPS business mailboxes 70, 681 homes
- Route C021 — USPS business mailboxes 64, 999 homes
Select these 5 routes on the route map
Every carrier route in 91103
| Route | Type | Homes | Businesses | Est. median income | Est. owners | Est. families with kids | Est. moved in past year |
|---|---|---|---|---|---|---|---|
| C002 | City | 1,302 | 163 | $82,901 | — | — | — |
| C005 | City | 677 | 42 | $79,735 | — | — | — |
| C010 | City | 681 | 70 | $101,020 | — | — | — |
| C012 | City | 466 | 12 | $102,201 | — | — | — |
| C014 | City | 507 | 2 | $160,477 | — | — | — |
| C017 | City | 743 | 3 | $100,559 | — | — | — |
| C018 | City | 313 | 299 | $156,206 | — | — | — |
| C019 | City | 710 | 25 | $79,735 | — | — | — |
| C020 | City | 422 | 3 | $200,001+ | — | — | — |
| C021 | City | 999 | 64 | $47,808 | — | — | — |
| C023 | City | 430 | 2 | $200,001+ | — | — | — |
| C024 | City | 389 | 3 | $64,654 | — | — | — |
| C025 | City | 797 | 10 | $100,559 | — | — | — |
| C026 | City | 557 | 96 | $114,192 | — | — | — |
| C027 | City | 868 | 7 | $72,981 | — | — | — |
| C034 | City | 78 | 1 | $102,201 | — | — | — |
Income, owners, families and movers are estimates for each route (how we estimate them); mailbox counts are current USPS figures. Open 91103 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
- 91105 — Pasadena city, CA (1.9 mi)
- 91101 — Pasadena city, CA (2 mi)
- 91104 — Pasadena city, CA (2.3 mi)
- 91001 — Altadena CDP, CA (2.4 mi)
- 91106 — Pasadena city, CA (2.8 mi)
- 91206 — Glendale city, CA (2.9 mi)
- 91125 — Pasadena city, CA (3 mi)
- 90041 — Los Angeles city, CA (3.2 mi)
Areas that include 91103
- Pasadena, CA ZIP codes — 7 ZIP codes
- Los Angeles County ZIP codes — 298 ZIP codes
- California ZIP code data
Where it ranks
- No. 4 of 6: highest median household income in Pasadena, CA
- No. 5 of 6: highest median home value in Pasadena, CA
- No. 4 of 7: highest share of owner-occupied homes in Pasadena, CA
- No. 2 of 7: highest share of households with children in Pasadena, CA
- No. 5 of 7: highest share of residents who moved in during the past year in Pasadena, CA
- No. 4 of 7: lowest median age in Pasadena, CA
- No. 4 of 7: highest median age in Pasadena, CA
Mail every home in 91103
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) 91103, which approximates the USPS ZIP code area. Census figures: American Community Survey 5-year estimates, 2020–2024.
Frequently asked questions
- What city is 91103 in?
- 91103 is a Pasadena, CA mailing address. By land area, 100% lies inside Pasadena.
- What county is 91103 in?
- 91103 is in Los Angeles County.
- What is the population of 91103?
- About 25,142 people (±1,490), according to the Census Bureau's American Community Survey 5-year estimates for 2020–2024. The 2020 Census counted 26,887.
- What is the median household income in 91103?
- $93,660 (±$9,602), 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 91103?
- 16 USPS carrier routes with 9,939 residential and 802 business mailboxes (10,741 in all), from the route data stored by EDDM2GO. An EDDM mailing can target any combination of these routes.
- What ZIP codes are near 91103?
- The closest, measured center to center: 91105 (1.9 mi, Pasadena), 91101 (2 mi, Pasadena), 91104 (2.3 mi, Pasadena), 91001 (2.4 mi, Altadena), 91106 (2.8 mi, Pasadena) and 91206 (2.9 mi, Glendale).
This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.