Zip Code 91340
Sylmar, California — Los Angeles County
📍 ZIP code 91340 is in Sylmar, Los Angeles County, California.
ZIP code 91340 is located in Sylmar, Los Angeles County, California. It is a zip code in the Pacific (PST/PDT) Time Zone with an estimated population of 33,750. The area code for ZIP code 91340 is 818.
Quick Answer
Zip code 91340 is in Sylmar, California (Los Angeles County). It has a population of 33,750, median household income of $79,124, and median home value of $624,900.
Population
33,750
Income
$79,124
Home Value
$624,900
Climate
90°F / 47°F
About Zip Code 91340
Zip code 91340 is located in Sylmar, California, within Los Angeles County. Home to approximately 33,750 residents, this area sits at an elevation of 1100 ft and falls within the Pacific (PST/PDT) timezone. The local area code is 818.
The median household income is $79,124 per year, which is above the national median of $70,784. Homes in this zip code have a median value of $624,900, and the cost of living index is 167 (67% above the national average of 100).
Summers average a high of 90°F while winters drop to 47°F. The area receives about 15 in of rain annually. The zip code covers 3.4 square miles of land area.
Key Statistics
33,750
$79,124
$624,900
Pacific (PST/PDT)
818
1100 ft
3.4 sq mi
36.4
9,011
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Compare With Nearby Zip Codes
| Metric | 91340 | 91345 | 91331 | 91342 | 91344 | 91343 |
|---|---|---|---|---|---|---|
| City | Sylmar, CA | San Fernando, CA | Pacoima, CA | Sylmar, CA | Sylmar, CA | Sylmar, CA |
| Population | 33,750 | 18,282 | 98,820 | 93,513 | 53,248 | 61,607 |
| Median Income | $79,124 | $96,345 | $82,025 | $95,480 | $116,647 | $81,719 |
| Home Value | $624,900 | $654,100 | $609,300 | $641,100 | $872,000 | $751,000 |
| Cost of Living | 167 | 182 | 166 | 177 | 233 | 191 |
| Median Age | 36.4 | 42.3 | 34.7 | 37.4 | 43.5 | 35.8 |
Cost of Living
100 = National Average. Sylmar's cost of living is 67% above the national average.
vs. State Avg
Above
Affordability
Expensive
Income-to-Home
7.9x
Demographics
Zip code 91340 has a population of 33,750 people with a median age of 36.4. There are 9,011 housing units in this area.
Racial & Ethnic Composition
Source: U.S. Census Bureau American Community Survey estimates.
Population History
Sylmar (91340) population trend from 2010 to 2024
↓ -16.1%Source: U.S. Census Bureau estimates and American Community Survey data.
Climate & Weather
90°F
47°F
15 in
0 in
Sylmar experiences hot summers with average highs around 90°F. Winters are mild with lows averaging 47°F. The area receives virtually no snowfall.
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Housing & Economy
Median Home Value
$624,900
Median Household Income
$79,124
With 9,011 housing units across 3.4 square miles, 91340 has a housing density of 2,650 units per square mile. The home price-to-income ratio is 7.9x.
Location & Geography
Latitude
34.2867°
Longitude
-118.4351°
Land Area
3.4 sq mi
Water Area
0 sq mi
Nearby Zip Codes
Zip codes closest to 91340 (Sylmar, CA) with distances:
All Zip Codes in Sylmar, CA
Other zip codes serving Sylmar:
ZIP Codes with Similar Income Nationwide
The five U.S. ZIP codes whose median household income is closest to 91340's $79,124. A way to compare Sylmar 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 91340 (Sylmar, 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 Sylmar, California?
Sylmar, California uses zip code 91340 along with 3 other zip codes.
What county is zip code 91340 in?
Zip code 91340 is located in Los Angeles County, California.
What is the population of zip code 91340?
The population of zip code 91340 is 33,750 with a median age of 36.4.
Is 91340 in Sylmar, California?
Yes, zip code 91340 is in Sylmar, Los Angeles County, California. The area code is 818.
Frequently Asked Questions
What city is zip code 91340 in?
Zip code 91340 is in Sylmar, California. It is part of Los Angeles County and uses the Pacific (PST/PDT) timezone.
What is zip code 91340?
Zip code 91340 is a U.S. postal code in Sylmar, California (Los Angeles County). It has a population of 33,750 and covers 3.4 square miles.
What is the population of zip code 91340?
The population of zip code 91340 (Sylmar, CA) is 33,750 with a median age of 36.4. There are approximately 9,011 housing units in this area.
What is the median income in zip code 91340?
The median household income in zip code 91340 (Sylmar, CA) is $79,124 per year. The cost of living index is 167 (100 = national average).
What is the average home price in zip code 91340?
The median home value in zip code 91340 (Sylmar, CA) is $624,900. The cost of living index is 167 compared to the national average of 100.
What county is zip code 91340 in?
Zip code 91340 is located in Los Angeles County, California. The primary city is Sylmar.
What is the area code for zip code 91340?
Zip code 91340 in Sylmar, CA uses area code 818. It is located in the Pacific (PST/PDT) timezone.
Is zip code 91340 a good place to live?
Zip code 91340 (Sylmar, CA) has a cost of living index of 167 (100 = national average), a median household income of $79,124, and median home values of $624,900. The median age is 36.4. Visit the full page for demographics, climate, and nearby zip code comparisons.
What is the cost of living in zip code 91340?
The cost of living index for zip code 91340 (Sylmar, CA) is 167, where 100 represents the national average. This area is above the national average. Median home value: $624,900.
What schools serve zip code 91340?
Zip code 91340 in Sylmar, 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.