Zip Code 91770
Rosemead, California — Los Angeles County
📍 ZIP code 91770 is in Rosemead, Los Angeles County, California.
ZIP code 91770 is located in Rosemead, Los Angeles County, California. It is a zip code in the Pacific (PST/PDT) Time Zone with an estimated population of 58,893. The area code for ZIP code 91770 is 805.
Quick Answer
Zip code 91770 is in Rosemead, California (Los Angeles County). It has a population of 58,893, median household income of $73,757, and median home value of $712,700.
Population
58,893
Income
$73,757
Home Value
$712,700
Climate
86°F / 46°F
About Zip Code 91770
Zip code 91770 is located in Rosemead, California, within Los Angeles County. Home to approximately 58,893 residents, this area sits at an elevation of 273 ft and falls within the Pacific (PST/PDT) timezone. The local area code is 805.
The median household income is $73,757 per year, which is above the national median of $70,784. Homes in this zip code have a median value of $712,700, and the cost of living index is 182 (82% above the national average of 100).
Summers average a high of 86°F while winters drop to 46°F. The area receives about 16 in of rain annually. The zip code covers 6.4 square miles of land area and 0.1 square miles of water.
Key Statistics
58,893
$73,757
$712,700
Pacific (PST/PDT)
805
273 ft
6.4 sq mi
44.6
17,704
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Compare With Nearby Zip Codes
| Metric | 91770 | 91776 | 91755 | 91733 | 91731 | 91780 |
|---|---|---|---|---|---|---|
| City | Rosemead, CA | San Gabriel, CA | Monterey Park, CA | El Monte, CA | El Monte, CA | Temple City, CA |
| Population | 58,893 | 37,769 | 26,413 | 41,716 | 28,122 | 35,136 |
| Median Income | $73,757 | $79,926 | $74,362 | $67,245 | $60,887 | $101,746 |
| Home Value | $712,700 | $816,400 | $761,900 | $601,600 | $614,000 | $922,900 |
| Cost of Living | 182 | 208 | 189 | 158 | 156 | 238 |
| Median Age | 44.6 | 42.3 | 45.1 | 38.9 | 35.8 | 42.9 |
Cost of Living
100 = National Average. Rosemead's cost of living is 82% above the national average.
vs. State Avg
Above
Affordability
Expensive
Income-to-Home
9.7x
Demographics
Zip code 91770 has a population of 58,893 people with a median age of 44.6. There are 17,704 housing units in this area.
Racial & Ethnic Composition
Source: U.S. Census Bureau American Community Survey estimates.
Population History
Rosemead (91770) population trend from 2010 to 2024
↑ 26.8%Source: U.S. Census Bureau estimates and American Community Survey data.
Climate & Weather
86°F
46°F
16 in
0 in
Rosemead experiences warm summers with average highs around 86°F. Winters are mild with lows averaging 46°F. The area receives virtually no snowfall.
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Housing & Economy
Median Home Value
$712,700
Median Household Income
$73,757
With 17,704 housing units across 6.4 square miles, 91770 has a housing density of 2,766 units per square mile. The home price-to-income ratio is 9.7x.
Location & Geography
Latitude
34.0655°
Longitude
-118.0845°
Land Area
6.4 sq mi
Water Area
0.1 sq mi
Nearby Zip Codes
Zip codes closest to 91770 (Rosemead, CA) with distances:
ZIP Codes with Similar Income Nationwide
The five U.S. ZIP codes whose median household income is closest to 91770's $73,757. A way to compare Rosemead to economically similar communities elsewhere in the country.
Computed from U.S. Census Bureau ACS 5-Year Estimates by the Zip Code Near Me Data Team.
ZIP Codes with Similar Demographics
The five U.S. ZIP codes whose racial and ethnic composition most closely matches 91770 (Rosemead, CA). Similarity is measured by cosine distance on the five-category ACS demographic vector.
Computed from U.S. Census Bureau ACS 5-Year Estimates by the Zip Code Near Me Data Team.
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People Also Ask
What zip code is Rosemead, California?
Rosemead, California uses zip code 91770.
What county is zip code 91770 in?
Zip code 91770 is located in Los Angeles County, California.
What is the population of zip code 91770?
The population of zip code 91770 is 58,893 with a median age of 44.6.
Is 91770 in Rosemead, California?
Yes, zip code 91770 is in Rosemead, Los Angeles County, California. The area code is 805.
Frequently Asked Questions
What city is zip code 91770 in?
Zip code 91770 is in Rosemead, California. It is part of Los Angeles County and uses the Pacific (PST/PDT) timezone.
What is zip code 91770?
Zip code 91770 is a U.S. postal code in Rosemead, California (Los Angeles County). It has a population of 58,893 and covers 6.4 square miles.
What is the population of zip code 91770?
The population of zip code 91770 (Rosemead, CA) is 58,893 with a median age of 44.6. There are approximately 17,704 housing units in this area.
What is the median income in zip code 91770?
The median household income in zip code 91770 (Rosemead, CA) is $73,757 per year. The cost of living index is 182 (100 = national average).
What is the average home price in zip code 91770?
The median home value in zip code 91770 (Rosemead, CA) is $712,700. The cost of living index is 182 compared to the national average of 100.
What county is zip code 91770 in?
Zip code 91770 is located in Los Angeles County, California. The primary city is Rosemead.
What is the area code for zip code 91770?
Zip code 91770 in Rosemead, CA uses area code 805. It is located in the Pacific (PST/PDT) timezone.
Is zip code 91770 a good place to live?
Zip code 91770 (Rosemead, CA) has a cost of living index of 182 (100 = national average), a median household income of $73,757, and median home values of $712,700. The median age is 44.6. Visit the full page for demographics, climate, and nearby zip code comparisons.
What is the cost of living in zip code 91770?
The cost of living index for zip code 91770 (Rosemead, CA) is 182, where 100 represents the national average. This area is above the national average. Median home value: $712,700.
What schools serve zip code 91770?
Zip code 91770 in Rosemead, California is served by the local school district of Los Angeles County. For specific school information, check your state's department of education or GreatSchools.org.
All demographic data on this page is sourced from the U.S. Census Bureau American Community Survey (ACS) 5-Year Estimates. ZIP code boundary and delivery data is sourced from the United States Postal Service (USPS). Data is updated periodically and may not reflect the most current figures. Census Bureau ZIP Code Tabulation Areas (ZCTAs) may differ slightly from USPS ZIP code boundaries.
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Data Sources
- Population, income, housing, age, and demographics
- U.S. Census Bureau, American Community Survey 5-Year Estimates, 2019-2023 vintage.
- ZIP to city and county mapping
- USPS and HUD-USPS ZIP-County Crosswalk.
- Time zones and area codes
- IANA tz database and NANPA.
- Elevation
- U.S. Geological Survey National Elevation Dataset (NED), via the USGS Elevation Point Query Service. Mapped to each ZCTA centroid coordinates. Last refreshed 2026-05-19.
- Last refreshed
- 2026-05-18.