91342 ZIP Code, Sylmar, CA
91342 is a ZIP code in Sylmar, California in Los Angeles County. It covers 45 square miles of land. The closest ZIP codes are 91340, 91040 and 91331. 93,301 people live here in 25,537 households, which puts it among the most populous 1% of California ZIP codes. At about 2,053 people per square mile it has suburban density, and owners and renters are mixed (68% own). Median household income is $98,118, close to the California median of $99,122; 41% of households have children under 18.
Quick facts
- Mailing city: Sylmar, CA
- County: Los Angeles County
- Land area: 45 sq mi
- Population: 93,301
- Median household income: $98,118
- Carrier routes: 36 (26,032 homes)
Key figures
| Measure | Value |
|---|---|
| Residents | 93,301 |
| Households | 25,537 |
| Median household income | $98,118 |
| Income per person | $32,744 |
| Median age | 37.5 |
| Homeowners | 67.8% |
| Median home value | $695,600 |
| Median rent | $1,963 |
| Bachelor's degree or higher | 20.8% |
| Average commute (minutes) | 31.2 |
| Households with kids under 18 | 40.9% |
| Moved in the past year | 5.8% |
| Below the poverty line | 12.0% |
| Broadband internet | 94.1% |
| Speak a non-English language at home | 66.3% |
Household income
| % of households | Value |
|---|---|
| <$10K | 4.0% |
| $10–15K | 2.4% |
| $15–25K | 4.7% |
| $25–35K | 6.8% |
| $35–50K | 7.9% |
| $50–75K | 13.6% |
| $75–100K | 11.9% |
| $100–150K | 20.7% |
| $150–200K | 13.1% |
| $200K+ | 14.8% |
Age
| % of all residents | Value |
|---|---|
| <10 | 11.2% |
| 10–19 | 14.7% |
| 20–24 | 6.6% |
| 25–34 | 14.2% |
| 35–44 | 13.7% |
| 45–54 | 13.6% |
| 55–64 | 12.7% |
| 65–74 | 8.6% |
| 75+ | 4.6% |
Tenure
| % of housing units | Value |
|---|---|
| Owned, with mortgage | 45.5% |
| Owned outright | 20.2% |
| Rented | 30.6% |
| Vacant | 3.7% |
Type of building
| % of housing units | Value |
|---|---|
| Detached house | 62.8% |
| Townhome | 9.6% |
| 2–4 units | 2.3% |
| 5–19 units | 5.6% |
| 20+ units | 12.5% |
| Mobile / other | 7.2% |
Businesses in 91342
1,314 business establishments with 22,754 employees (ZIP Codes Business Patterns 2023).
- Construction: 290
- Retail Trade: 125
- Health Care and Social Assistance: 114
- Accommodation and Food Services: 101
- Transportation and Warehousing: 99
- Administrative and Support and Waste Management and Remediation Services: 98
- Other Services (except Public Administration): 91
- Wholesale Trade: 81
EDDM carrier routes
91342 has 36 USPS carrier routes with 26,032 residential and 1,337 business mailboxes. Open the EDDM route map.
Carrier routes in 91342
91342 has 36 USPS carrier routes (36 city (C)) with 26,032 residential and 1,337 business mailboxes. Routes range from 429 homes (C029) to 1,441 homes (C031); the median route has 645 homes. The Census counted 25,537 households in 91342 (2020–2024 average); USPS counts current mailboxes, including new and vacant homes.
| Homes per route | Routes |
|---|---|
| 1–249 | 0 |
| 250–499 | 1 |
| 500–749 | 24 |
| 750–999 | 8 |
| 1,000–1,499 | 3 |
| 1,500+ | 0 |
Best routes in 91342 for…
Most businesses
For B2B offers: office supplies, cleaning, IT, catering and commercial services.
- Route C029 — USPS business mailboxes 362, 429 homes
- Route C046 — USPS business mailboxes 190, 1,337 homes
- Route C015 — USPS business mailboxes 115, 534 homes
- Route C014 — USPS business mailboxes 102, 570 homes
- Route C007 — USPS business mailboxes 60, 671 homes
Select these 5 routes on the route map
Every carrier route in 91342
| Route | Type | Homes | Businesses | Est. median income | Est. owners | Est. families with kids | Est. moved in past year |
|---|---|---|---|---|---|---|---|
| C001 | City | 715 | 3 | $88,506 | — | — | — |
| C004 | City | 930 | 15 | $59,038 | — | — | — |
| C005 | City | 783 | 50 | $102,832 | — | — | — |
| C006 | City | 506 | 1 | $107,951 | — | — | — |
| C007 | City | 671 | 60 | $82,989 | — | — | — |
| C008 | City | 593 | 3 | $107,884 | — | — | — |
| C009 | City | 590 | 1 | $121,519 | — | — | — |
| C011 | City | 518 | 3 | $123,986 | — | — | — |
| C012 | City | 589 | 16 | $122,307 | — | — | — |
| C013 | City | 905 | 6 | $78,179 | — | — | — |
| C014 | City | 570 | 102 | $90,021 | — | — | — |
| C015 | City | 534 | 115 | $72,564 | — | — | — |
| C017 | City | 585 | 0 | $99,491 | — | — | — |
| C018 | City | 639 | 5 | $117,518 | — | — | — |
| C019 | City | 747 | 45 | $90,021 | — | — | — |
| C022 | City | 634 | 7 | $135,154 | — | — | — |
| C023 | City | 644 | 50 | $135,154 | — | — | — |
| C024 | City | 604 | 3 | $121,519 | — | — | — |
| C026 | City | 581 | 30 | $115,378 | — | — | — |
| C027 | City | 591 | 27 | $83,032 | — | — | — |
| C028 | City | 567 | 1 | $125,898 | — | — | — |
| C029 | City | 429 | 362 | — | — | — | — |
| C030 | City | 799 | 43 | $89,612 | — | — | — |
| C031 | City | 1,441 | 8 | $76,147 | — | — | — |
| C032 | City | 902 | 18 | $63,651 | — | — | — |
| C033 | City | 943 | 11 | $125,898 | — | — | — |
| C034 | City | 667 | 0 | $139,395 | — | — | — |
| C035 | City | 1,014 | 6 | $99,491 | — | — | — |
| C036 | City | 650 | 2 | $72,564 | — | — | — |
| C039 | City | 529 | 3 | $101,011 | — | — | — |
| C040 | City | 562 | 34 | $117,518 | — | — | — |
| C041 | City | 909 | 19 | $58,941 | — | — | — |
| C042 | City | 646 | 58 | — | — | — | — |
| C043 | City | 964 | 4 | $117,270 | — | — | — |
| C045 | City | 744 | 36 | $72,564 | — | — | — |
| C046 | City | 1,337 | 190 | $76,147 | — | — | — |
Income, owners, families and movers are estimates for each route (how we estimate them); mailbox counts are current USPS figures. Open 91342 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
- 91340 — San Fernando city, CA (4.1 mi)
- 91040 — Los Angeles city, CA (5.4 mi)
- 91331 — Los Angeles city, CA (5.4 mi)
- 91387 — Santa Clarita city, CA (5.4 mi)
- 91345 — Los Angeles city, CA (6 mi)
- 91321 — Santa Clarita city, CA (6.5 mi)
- 91042 — Los Angeles city, CA (6.7 mi)
- 91352 — Los Angeles city, CA (6.7 mi)
Areas that include 91342
- Los Angeles, CA ZIP codes — 123 ZIP codes
- Sylmar, CA ZIP codes — 1 ZIP code
- Los Angeles County ZIP codes — 298 ZIP codes
- California ZIP code data
Mail every home in 91342
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.
Los Angeles EDDM mailing
EDDM guides
ZIP code statistics describe the Census ZIP Code Tabulation Area (ZCTA) 91342, which approximates the USPS ZIP code area. Census figures: American Community Survey 5-year estimates, 2020–2024.
Frequently asked questions
- What city is 91342 in?
- 91342 is a Sylmar, CA mailing address. By land area, 38% lies inside Los Angeles; the rest is outside any Census-defined city or community.
- What county is 91342 in?
- 91342 is in Los Angeles County.
- What is the population of 91342?
- About 93,301 people (±3,658), according to the Census Bureau's American Community Survey 5-year estimates for 2020–2024. The 2020 Census counted 96,429.
- What is the median household income in 91342?
- $98,118 (±$3,405), 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 91342?
- 36 USPS carrier routes with 26,032 residential and 1,337 business mailboxes (27,369 in all), from the route data stored by EDDM2GO. An EDDM mailing can target any combination of these routes.
- What ZIP codes are near 91342?
- The closest, measured center to center: 91340 (4.1 mi, San Fernando), 91040 (5.4 mi, Los Angeles), 91331 (5.4 mi, Los Angeles), 91387 (5.4 mi, Santa Clarita), 91345 (6 mi, Los Angeles) and 91321 (6.5 mi, Santa Clarita).
This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.