78251 ZIP Code, San Antonio, TX

78251 is a ZIP code in San Antonio, Texas in Bexar County. It covers 15 square miles of land, centered about 11 miles west of downtown San Antonio. The closest ZIP codes are 78250, 78238 and 78227. 59,435 people live here in 22,275 households, more than in 9 of every 10 Texas ZIP codes. At about 3,967 people per square mile it has suburban density, and owners and renters are mixed (51% own). Median household income is $78,958, close to the Texas median of $78,476.

Quick facts

Key figures

MeasureValue
Residents59,435
Households22,275
Median household income$78,958
Income per person$37,549
Median age33.2
Homeowners50.8%
Median home value$268,300
Median rent$1,413
Bachelor's degree or higher33.8%
Average commute (minutes)24.5
Households with kids under 1832.8%
Moved in the past year16.0%
Below the poverty line8.7%
Broadband internet96.2%
Speak a non-English language at home30.6%

Household income

% of householdsValue
<$10K2.8%
$10–15K1.9%
$15–25K5.3%
$25–35K7.3%
$35–50K12.0%
$50–75K17.3%
$75–100K16.3%
$100–150K19.0%
$150–200K10.5%
$200K+7.6%

Age

% of all residentsValue
<1012.1%
10–1913.0%
20–2410.2%
25–3417.3%
35–4415.3%
45–5413.1%
55–6410.4%
65–746.1%
75+2.7%

Tenure

% of housing unitsValue
Owned, with mortgage34.1%
Owned outright14.2%
Rented46.5%
Vacant5.2%

Type of building

% of housing unitsValue
Detached house56.3%
Townhome0.8%
2–4 units5.7%
5–19 units24.2%
20+ units12.9%
Mobile / other0.1%

Businesses in 78251

968 business establishments with 30,862 employees (ZIP Codes Business Patterns 2023).

EDDM carrier routes

78251 has 27 USPS carrier routes with 24,502 residential and 1,332 business mailboxes. Open the EDDM route map.

Carrier routes in 78251

78251 has 27 USPS carrier routes (10 city (C), 17 rural (R)) with 24,502 residential and 1,332 business mailboxes. Routes range from 232 homes (R129) to 1,713 homes (C009); the median route has 892 homes. The Census counted 22,275 households in 78251 (2020–2024 average); USPS counts current mailboxes, including new and vacant homes.

Homes per routeRoutes
1–2491
250–4990
500–7496
750–99910
1,000–1,4999
1,500+1

Best routes in 78251 for…

Highest income

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

  1. Route C004 — Est. median household income $135,359, 752 homes
  2. Route R139 — Est. median household income $117,949, 923 homes
  3. Route C030 — Est. median household income $117,155, 610 homes
  4. Route R087 — Est. median household income $106,929, 811 homes
  5. Route C012 — Est. median household income $102,525, 694 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 R129 — Est. families with children under 18 45.9%, 232 homes
  2. Route R093 — Est. families with children under 18 45.2%, 732 homes
  3. Route R269 — Est. families with children under 18 43.6%, 642 homes
  4. Route C029 — Est. families with children under 18 43.3%, 939 homes
  5. Route R066 — Est. families with children under 18 43.0%, 778 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 C004 — Est. owner-occupied homes 93.7%, 752 homes
  2. Route R139 — Est. owner-occupied homes 88.0%, 923 homes
  3. Route C012 — Est. owner-occupied homes 83.6%, 694 homes
  4. Route R129 — Est. owner-occupied homes 82.2%, 232 homes
  5. Route R269 — Est. owner-occupied homes 77.0%, 642 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 R181 — Est. residents who moved in the past year 28.9%, 892 homes
  2. Route R092 — Est. residents who moved in the past year 26.3%, 1,090 homes
  3. Route R211 — Est. residents who moved in the past year 26.2%, 1,042 homes
  4. Route R127 — Est. residents who moved in the past year 25.5%, 1,179 homes
  5. Route R155 — Est. residents who moved in the past year 22.4%, 1,061 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 C016 — Est. homes built 2010 or later 52.6%, 875 homes
  2. Route C024 — Est. homes built 2010 or later 43.8%, 1,432 homes
  3. Route R028 — Est. homes built 2010 or later 39.7%, 633 homes
  4. Route C030 — Est. homes built 2010 or later 35.9%, 610 homes
  5. Route R211 — Est. homes built 2010 or later 35.0%, 1,042 homes

Select these 5 routes on the route map

Most businesses

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

  1. Route R129 — USPS business mailboxes 192, 232 homes
  2. Route R066 — USPS business mailboxes 177, 778 homes
  3. Route R093 — USPS business mailboxes 163, 732 homes
  4. Route C010 — USPS business mailboxes 106, 844 homes
  5. Route R269 — USPS business mailboxes 97, 642 homes

Select these 5 routes on the route map

Every carrier route in 78251

RouteTypeHomesBusinessesEst. median incomeEst. ownersEst. families with kidsEst. moved in past year
C004City7528$135,35993.7%37.0%8.9%
C009City1,7134$59,75830.4%30.8%6.9%
C010City844106$58,39135.7%28.1%10.8%
C012City69410$102,52583.6%30.3%6.2%
C014City1,09681$47,34915.3%33.9%9.0%
C016City8750$81,49356.6%36.6%19.8%
C024City1,4329$67,72230.9%35.0%14.7%
C026City1,0113$67,65045.4%20.3%10.8%
C029City93951$97,86470.3%43.3%4.9%
C030City6102$117,15575.9%33.9%16.4%
R028Rural6332$90,79633.9%24.5%12.9%
R066Rural778177$70,82155.8%43.0%12.1%
R087Rural81184$106,92973.9%38.3%11.7%
R092Rural1,09074$72,50527.3%28.5%26.3%
R093Rural732163$89,01776.2%45.2%15.4%
R099Rural92748$80,54448.5%29.3%19.4%
R127Rural1,1799$82,49951.4%36.1%25.5%
R129Rural232192$91,14882.2%45.9%8.3%
R139Rural9230$117,94988.0%38.4%11.8%
R147Rural58262$83,14261.3%41.1%11.2%
R155Rural1,0614$80,97245.2%29.9%22.4%
R172Rural8060$94,27775.4%40.1%13.4%
R181Rural89213$72,40125.0%28.1%28.9%
R211Rural1,04286$71,57226.8%24.5%26.2%
R226Rural1,09823$80,72543.9%25.6%17.4%
R252Rural1,10824$101,44071.3%36.0%9.1%
R269Rural64297$85,80377.0%43.6%19.7%

Income, owners, families and movers are estimates for each route (how we estimate them); mailbox counts are current USPS figures. Open 78251 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 78251

Where it ranks

Mail every home in 78251

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) 78251, which approximates the USPS ZIP code area. Census figures: American Community Survey 5-year estimates, 2020–2024.

Frequently asked questions

What city is 78251 in?
78251 is a San Antonio, TX mailing address. By land area, 100% lies inside San Antonio.
What county is 78251 in?
78251 is in Bexar County.
What is the population of 78251?
About 59,435 people (±4,371), according to the Census Bureau's American Community Survey 5-year estimates for 2020–2024. The 2020 Census counted 58,836.
What is the median household income in 78251?
$78,958 (±$3,842), 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 78251?
27 USPS carrier routes with 24,502 residential and 1,332 business mailboxes (25,835 in all), from the route data stored by EDDM2GO. An EDDM mailing can target any combination of these routes.
What ZIP codes are near 78251?
The closest, measured center to center: 78250 (2.9 mi, San Antonio), 78238 (3.6 mi, San Antonio), 78227 (5.4 mi, San Antonio), 78254 (5.6 mi, San Antonio), 78245 (6.1 mi, San Antonio) and 78236 (6.2 mi, Lackland AFB).

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