91390 ZIP Code, Santa Clarita, CA

91390 is a ZIP code in Santa Clarita, California in Los Angeles County. It covers 158 square miles of land. The closest ZIP codes are 93532, 91354 and 91350. 19,308 people live here in 6,414 households. With about 122 people per square mile it is lightly settled, and most homes are owner-occupied (87%). Median household income is $151,897, well above the California median of $99,122; the median age is 46.7, older than most ZIP codes.

Quick facts

Key figures

MeasureValue
Residents19,308
Households6,414
Median household income$151,897
Income per person$59,439
Median age46.7
Homeowners86.6%
Median home value$878,400
Median rent$2,508
Bachelor's degree or higher42.3%
Average commute (minutes)33
Households with kids under 1830.2%
Moved in the past year6.6%
Below the poverty line5.5%
Broadband internet94.5%
Speak a non-English language at home21.4%

Household income

% of householdsValue
<$10K1.2%
$10–15K1.4%
$15–25K3.3%
$25–35K3.9%
$35–50K6.5%
$50–75K8.9%
$75–100K7.8%
$100–150K15.9%
$150–200K16.6%
$200K+34.4%

Age

% of all residentsValue
<108.2%
10–1914.9%
20–245.1%
25–349.9%
35–449.9%
45–5415.8%
55–6421.1%
65–7410.3%
75+4.8%

Tenure

% of housing unitsValue
Owned, with mortgage58.6%
Owned outright24.4%
Rented12.8%
Vacant4.1%

Type of building

% of housing unitsValue
Detached house84.2%
Townhome7.7%
2–4 units0.3%
5–19 units4.1%
20+ units0.5%
Mobile / other3.2%

Businesses in 91390

310 business establishments with 1,614 employees (ZIP Codes Business Patterns 2023).

EDDM carrier routes

91390 has 12 USPS carrier routes with 6,571 residential and 130 business mailboxes. Open the EDDM route map.

Carrier routes in 91390

91390 has 12 USPS carrier routes (4 city (C), 8 rural (R)) with 6,571 residential and 130 business mailboxes. Routes range from 217 homes (C019) to 844 homes (C018); the median route has 546 homes. The Census counted 6,414 households in 91390 (2020–2024 average); USPS counts current mailboxes, including new and vacant homes.

Homes per routeRoutes
1–2491
250–4993
500–7496
750–9992
1,000–1,4990
1,500+0

Best routes in 91390 for…

Most businesses

For B2B offers: office supplies, cleaning, IT, catering and commercial services.

  1. Route R004 — USPS business mailboxes 35, 395 homes
  2. Route R029 — USPS business mailboxes 27, 526 homes
  3. Route R002 — USPS business mailboxes 17, 565 homes
  4. Route C015 — USPS business mailboxes 14, 760 homes
  5. Route R021 — USPS business mailboxes 14, 506 homes

Select these 5 routes on the route map

Every carrier route in 91390

RouteTypeHomesBusinessesEst. median incomeEst. ownersEst. families with kidsEst. moved in past year
C014City7255$101,846———
C015City76014$173,295———
C018City8442$200,001+———
C019City2170$127,506———
R002Rural56517$200,001+———
R004Rural39535$106,288———
R007Rural6505$173,295———
R013Rural4729$85,552———
R021Rural50614$101,846———
R029Rural52627$142,148———
R044Rural6322$173,295———
R059Rural2790$173,295———

Income, owners, families and movers are estimates for each route (how we estimate them); mailbox counts are current USPS figures. Open 91390 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

Areas that include 91390

Where it ranks

Mail every home in 91390

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) 91390, which approximates the USPS ZIP code area. Census figures: American Community Survey 5-year estimates, 2020–2024.

Frequently asked questions

What city is 91390 in?
91390 is a Santa Clarita, CA mailing address. By land area, 14% lies inside Agua Dulce, 8% lies inside Green Valley and 3% lies inside Santa Clarita; the rest is outside any Census-defined city or community.
What county is 91390 in?
91390 is in Los Angeles County.
What is the population of 91390?
About 19,308 people (±1,410), according to the Census Bureau's American Community Survey 5-year estimates for 2020–2024. The 2020 Census counted 20,128.
What is the median household income in 91390?
$151,897 (±$19,522), 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 91390?
12 USPS carrier routes with 6,571 residential and 130 business mailboxes (6,701 in all), from the route data stored by EDDM2GO. An EDDM mailing can target any combination of these routes.
What ZIP codes are near 91390?
The closest, measured center to center: 93532 (8.2 mi, Lake Hughes), 91354 (8.9 mi, Santa Clarita), 91350 (10.1 mi, Santa Clarita), 91351 (10.1 mi, Santa Clarita), 91384 (10.7 mi, Castaic) and 93536 (12.6 mi, Lancaster).

This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.