78240 ZIP Code, San Antonio, TX

78240 is a ZIP code in San Antonio, Texas in Bexar County. It covers 11 square miles of land, centered about 9.7 miles northwest of downtown San Antonio. The closest ZIP codes are 78229, 78249 and 78230. 57,921 people live here in 24,991 households, more than in 9 of every 10 Texas ZIP codes. At about 5,184 people per square mile it is built up to city-neighborhood density, and most households rent (34% own). Median household income is $63,351, below the Texas median of $78,476; 24% of residents moved in during the past year.

Quick facts

Key figures

MeasureValue
Residents57,921
Households24,991
Median household income$63,351
Income per person$39,127
Median age33
Homeowners34.4%
Median home value$257,500
Median rent$1,342
Bachelor's degree or higher38.4%
Average commute (minutes)23.5
Households with kids under 1826.3%
Moved in the past year23.7%
Below the poverty line15.6%
Broadband internet91.5%
Speak a non-English language at home39.3%

Household income

% of householdsValue
<$10K5.9%
$10–15K3.7%
$15–25K7.2%
$25–35K8.1%
$35–50K14.2%
$50–75K19.7%
$75–100K12.5%
$100–150K14.2%
$150–200K7.4%
$200K+7.2%

Age

% of all residentsValue
<1012.9%
10–1911.0%
20–249.5%
25–3420.3%
35–4414.6%
45–549.5%
55–649.3%
65–747.1%
75+5.9%

Tenure

% of housing unitsValue
Owned, with mortgage18.2%
Owned outright12.3%
Rented57.4%
Vacant12.1%

Type of building

% of housing unitsValue
Detached house32.3%
Townhome6.2%
2–4 units8.9%
5–19 units33.4%
20+ units18.7%
Mobile / other0.6%

Businesses in 78240

877 business establishments with 12,883 employees (ZIP Codes Business Patterns 2023).

EDDM carrier routes

78240 has 21 USPS carrier routes with 28,813 residential and 1,012 business mailboxes. Open the EDDM route map.

Carrier routes in 78240

78240 has 21 USPS carrier routes (21 city (C)) with 28,813 residential and 1,012 business mailboxes. Routes range from 736 homes (C028) to 2,165 homes (C031); the median route has 1,286 homes. The Census counted 24,991 households in 78240 (2020–2024 average); USPS counts current mailboxes, including new and vacant homes.

Homes per routeRoutes
1–2490
250–4990
500–7491
750–9995
1,000–1,4998
1,500+7

Best routes in 78240 for…

Highest income

For bigger-ticket offers: remodeling, pools, financial planning, private schools.

  1. Route C017 — Est. median household income $125,713, 984 homes
  2. Route C024 — Est. median household income $114,563, 766 homes
  3. Route C035 — Est. median household income $111,601, 828 homes
  4. Route C021 — Est. median household income $102,697, 1,391 homes
  5. Route C028 — Est. median household income $92,155, 736 homes

Select these 5 routes on the route map

Often mailed by: Home services EDDM, Real estate EDDM postcards, Landscaping and lawn care mailers

Most families with kids

For tutoring, youth sports, pediatric dental, child care and family dining.

  1. Route C033 — Est. families with children under 18 41.7%, 2,161 homes
  2. Route C039 — Est. families with children under 18 33.3%, 1,235 homes
  3. Route C035 — Est. families with children under 18 32.6%, 828 homes
  4. Route C024 — Est. families with children under 18 32.5%, 766 homes
  5. Route C029 — Est. families with children under 18 31.9%, 991 homes

Select these 5 routes on the route map

Often mailed by: Dental practice EDDM, Healthcare and clinic mailers

Most homeowners

Owners decide on roofs, HVAC, lawns, solar and insurance; renters usually can't.

  1. Route C024 — Est. owner-occupied homes 97.9%, 766 homes
  2. Route C035 — Est. owner-occupied homes 92.4%, 828 homes
  3. Route C029 — Est. owner-occupied homes 83.7%, 991 homes
  4. Route C028 — Est. owner-occupied homes 82.8%, 736 homes
  5. Route C017 — Est. owner-occupied homes 69.0%, 984 homes

Select these 5 routes on the route map

Often mailed by: Roofing direct mail, HVAC postcards

Most new movers

New residents are still choosing a dentist, a gym and a lawn service.

  1. Route C039 — Est. residents who moved in the past year 33.8%, 1,235 homes
  2. Route C027 — Est. residents who moved in the past year 33.0%, 2,127 homes
  3. Route C033 — Est. residents who moved in the past year 32.8%, 2,161 homes
  4. Route C023 — Est. residents who moved in the past year 31.7%, 1,840 homes
  5. Route C030 — Est. residents who moved in the past year 30.1%, 1,779 homes

Select these 5 routes on the route map

Often mailed by: Restaurant EDDM menus and offers, Gym and fitness mailers

Newest homes

Newer subdivisions: landscaping, window treatments, fencing, security, home warranties.

  1. Route C040 — Est. homes built 2010 or later 26.5%, 1,205 homes
  2. Route C031 — Est. homes built 2010 or later 25.8%, 2,165 homes
  3. Route C030 — Est. homes built 2010 or later 22.8%, 1,779 homes
  4. Route C034 — Est. homes built 2010 or later 21.4%, 1,301 homes
  5. Route C020 — Est. homes built 2010 or later 14.6%, 1,788 homes

Select these 5 routes on the route map

Most businesses

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

  1. Route C040 — USPS business mailboxes 253, 1,205 homes
  2. Route C032 — USPS business mailboxes 145, 1,142 homes
  3. Route C039 — USPS business mailboxes 123, 1,235 homes
  4. Route C031 — USPS business mailboxes 113, 2,165 homes
  5. Route C027 — USPS business mailboxes 85, 2,127 homes

Select these 5 routes on the route map

Every carrier route in 78240

RouteTypeHomesBusinessesEst. median incomeEst. ownersEst. families with kidsEst. moved in past year
C017City98410$125,71369.0%25.0%15.7%
C019City1,78012$59,60932.1%25.8%24.5%
C020City1,78838$68,70549.9%23.6%17.0%
C021City1,39113$102,69768.7%23.6%6.3%
C022City8887$70,65067.9%21.7%12.8%
C023City1,84082$49,90233.9%28.1%31.7%
C024City7660$114,56397.9%32.5%4.6%
C025City1,2866$63,54752.6%20.2%21.6%
C026City1,3159$69,86555.1%19.1%11.4%
C027City2,12785$51,4696.2%28.5%33.0%
C028City7362$92,15582.8%26.9%11.3%
C029City9913$82,89983.7%31.9%13.4%
C030City1,7795$48,82518.5%14.6%30.1%
C031City2,165113$66,21411.7%22.4%27.9%
C032City1,142145$59,00827.1%24.0%15.9%
C033City2,16116$44,90811.4%41.7%32.8%
C034City1,30154$83,10041.7%25.4%22.9%
C035City8282$111,60192.4%32.6%10.0%
C038City1,10534$73,22166.6%25.9%14.2%
C039City1,235123$40,98413.6%33.3%33.8%
C040City1,205253$75,21023.0%19.9%24.8%

Income, owners, families and movers are estimates for each route (how we estimate them); mailbox counts are current USPS figures. Open 78240 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 78240

Where it ranks

Mail every home in 78240

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.

San Antonio EDDM mailing

EDDM guides

ZIP code statistics describe the Census ZIP Code Tabulation Area (ZCTA) 78240, which approximates the USPS ZIP code area. Census figures: American Community Survey 5-year estimates, 2020–2024.

Frequently asked questions

What city is 78240 in?
78240 is a San Antonio, TX mailing address. By land area, 90% lies inside San Antonio and 10% lies inside Leon Valley.
What county is 78240 in?
78240 is in Bexar County.
What is the population of 78240?
About 57,921 people (±3,233), according to the Census Bureau's American Community Survey 5-year estimates for 2020–2024. The 2020 Census counted 56,112.
What is the median household income in 78240?
$63,351 (±$4,264), compared with $78,476 for Texas as a whole. Half the households in the ZIP code earn more and half earn less.
How many carrier routes and mailboxes are in 78240?
21 USPS carrier routes with 28,813 residential and 1,012 business mailboxes (29,826 in all), from the route data stored by EDDM2GO. An EDDM mailing can target any combination of these routes.
What ZIP codes are near 78240?
The closest, measured center to center: 78229 (2.1 mi, San Antonio), 78249 (2.9 mi, San Antonio), 78230 (3.2 mi, San Antonio), 78238 (3.8 mi, San Antonio), 78250 (4 mi, San Antonio) and 78213 (4.9 mi, San Antonio).

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