91770 ZIP Code, Rosemead, CA
91770 is a ZIP code in Rosemead, California in Los Angeles County. It covers 6.5 square miles of land. The closest ZIP codes are 91776, 91733 and 91755. 58,382 people live here in 16,872 households, more than in 9 of every 10 California ZIP codes. At about 8,949 people per square mile it is built up to city-neighborhood density, and owners and renters are mixed (49% own). Median household income is $75,000, below the California median of $99,122.
Quick facts
- Mailing city: Rosemead, CA
- County: Los Angeles County
- Land area: 6.5 sq mi
- Population: 58,382
- Median household income: $75,000
- Carrier routes: 27 (17,520 homes)
Key figures
| Measure | Value |
|---|---|
| Residents | 58,382 |
| Households | 16,872 |
| Median household income | $75,000 |
| Income per person | $28,523 |
| Median age | 44.5 |
| Homeowners | 49.0% |
| Median home value | $790,200 |
| Median rent | $1,847 |
| Bachelor's degree or higher | 21.9% |
| Average commute (minutes) | 27 |
| Households with kids under 18 | 31.2% |
| Moved in the past year | 4.4% |
| Below the poverty line | 12.7% |
| Broadband internet | 91.7% |
| Speak a non-English language at home | 80.0% |
Household income
| % of households | Value |
|---|---|
| <$10K | 3.3% |
| $10–15K | 3.5% |
| $15–25K | 7.6% |
| $25–35K | 8.2% |
| $35–50K | 11.3% |
| $50–75K | 16.1% |
| $75–100K | 13.7% |
| $100–150K | 18.5% |
| $150–200K | 8.7% |
| $200K+ | 9.2% |
Age
| % of all residents | Value |
|---|---|
| <10 | 7.6% |
| 10–19 | 11.4% |
| 20–24 | 5.3% |
| 25–34 | 12.8% |
| 35–44 | 13.7% |
| 45–54 | 13.8% |
| 55–64 | 14.7% |
| 65–74 | 12.0% |
| 75+ | 8.7% |
Tenure
| % of housing units | Value |
|---|---|
| Owned, with mortgage | 21.9% |
| Owned outright | 24.5% |
| Rented | 47.9% |
| Vacant | 5.7% |
Type of building
| % of housing units | Value |
|---|---|
| Detached house | 74.2% |
| Townhome | 12.5% |
| 2–4 units | 2.8% |
| 5–19 units | 4.4% |
| 20+ units | 4.3% |
| Mobile / other | 1.7% |
Businesses in 91770
1,514 business establishments with 15,452 employees (ZIP Codes Business Patterns 2023).
- Transportation and Warehousing: 225
- Accommodation and Food Services: 185
- Retail Trade: 180
- Health Care and Social Assistance: 166
- Other Services (except Public Administration): 145
- Professional, Scientific, and Technical Services: 131
- Wholesale Trade: 118
- Construction: 99
EDDM carrier routes
91770 has 27 USPS carrier routes with 17,520 residential and 1,480 business mailboxes. Open the EDDM route map.
Carrier routes in 91770
91770 has 27 USPS carrier routes (27 city (C)) with 17,520 residential and 1,480 business mailboxes. Routes range from 466 homes (C002) to 790 homes (C041); the median route has 656 homes. The Census counted 16,872 households in 91770 (2020–2024 average); USPS counts current mailboxes, including new and vacant homes.
| Homes per route | Routes |
|---|---|
| 1–249 | 0 |
| 250–499 | 2 |
| 500–749 | 23 |
| 750–999 | 2 |
| 1,000–1,499 | 0 |
| 1,500+ | 0 |
Best routes in 91770 for…
Most businesses
For B2B offers: office supplies, cleaning, IT, catering and commercial services.
- Route C014 — USPS business mailboxes 218, 690 homes
- Route C030 — USPS business mailboxes 218, 599 homes
- Route C039 — USPS business mailboxes 189, 737 homes
- Route C002 — USPS business mailboxes 185, 466 homes
- Route C011 — USPS business mailboxes 168, 610 homes
Select these 5 routes on the route map
Every carrier route in 91770
| Route | Type | Homes | Businesses | Est. median income | Est. owners | Est. families with kids | Est. moved in past year |
|---|---|---|---|---|---|---|---|
| C001 | City | 685 | 6 | $69,055 | — | — | — |
| C002 | City | 466 | 185 | $78,730 | — | — | — |
| C003 | City | 660 | 18 | $62,613 | — | — | — |
| C004 | City | 736 | 50 | $73,190 | — | — | — |
| C005 | City | 633 | 23 | $77,325 | — | — | — |
| C006 | City | 506 | 10 | $78,730 | — | — | — |
| C007 | City | 732 | 3 | $68,469 | — | — | — |
| C008 | City | 579 | 42 | $104,436 | — | — | — |
| C009 | City | 584 | 24 | $80,356 | — | — | — |
| C010 | City | 469 | 35 | $75,000 | — | — | — |
| C011 | City | 610 | 168 | $94,667 | — | — | — |
| C013 | City | 670 | 12 | $73,190 | — | — | — |
| C014 | City | 690 | 218 | $68,469 | — | — | — |
| C015 | City | 656 | 13 | $94,667 | — | — | — |
| C024 | City | 648 | 11 | $58,646 | — | — | — |
| C025 | City | 631 | 66 | $88,970 | — | — | — |
| C026 | City | 683 | 3 | $51,553 | — | — | — |
| C027 | City | 660 | 64 | $49,416 | — | — | — |
| C030 | City | 599 | 218 | $73,528 | — | — | — |
| C031 | City | 770 | 15 | $51,553 | — | — | — |
| C033 | City | 729 | 8 | $91,022 | — | — | — |
| C034 | City | 609 | 24 | $111,061 | — | — | — |
| C036 | City | 635 | 61 | $55,712 | — | — | — |
| C037 | City | 609 | 2 | $55,712 | — | — | — |
| C038 | City | 744 | 12 | $58,646 | — | — | — |
| C039 | City | 737 | 189 | $45,341 | — | — | — |
| C041 | City | 790 | 0 | $79,746 | — | — | — |
Income, owners, families and movers are estimates for each route (how we estimate them); mailbox counts are current USPS figures. Open 91770 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
- 91776 — San Gabriel city, CA (1.8 mi)
- 91733 — South El Monte city, CA (2.1 mi)
- 91755 — Monterey Park city, CA (2.1 mi)
- 91731 — El Monte city, CA (2.4 mi)
- 91780 — Temple City city, CA (2.9 mi)
- 91801 — Alhambra city, CA (3.1 mi)
- 91775 — East San Gabriel CDP, CA (3.5 mi)
- 91754 — Monterey Park city, CA (3.6 mi)
Areas that include 91770
- Rosemead, CA ZIP codes — 1 ZIP code
- South San Gabriel, CA ZIP codes — 1 ZIP code
- Los Angeles County ZIP codes — 298 ZIP codes
- California ZIP code data
Mail every home in 91770
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) 91770, which approximates the USPS ZIP code area. Census figures: American Community Survey 5-year estimates, 2020–2024.
Frequently asked questions
- What city is 91770 in?
- 91770 is a Rosemead, CA mailing address. By land area, 78% lies inside Rosemead and 13% lies inside South San Gabriel; the rest is outside any Census-defined city or community.
- What county is 91770 in?
- 91770 is in Los Angeles County.
- What is the population of 91770?
- About 58,382 people (±1,268), according to the Census Bureau's American Community Survey 5-year estimates for 2020–2024. The 2020 Census counted 59,360.
- What is the median household income in 91770?
- $75,000 (±$5,092), 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 91770?
- 27 USPS carrier routes with 17,520 residential and 1,480 business mailboxes (19,000 in all), from the route data stored by EDDM2GO. An EDDM mailing can target any combination of these routes.
- What ZIP codes are near 91770?
- The closest, measured center to center: 91776 (1.8 mi, San Gabriel), 91733 (2.1 mi, South El Monte), 91755 (2.1 mi, Monterey Park), 91731 (2.4 mi, El Monte), 91780 (2.9 mi, Temple City) and 91801 (3.1 mi, Alhambra).
This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.