78257 ZIP Code, San Antonio, TX
78257 is a ZIP code in San Antonio, Texas in Bexar County. It covers 28 square miles of land, centered about 16 miles north of downtown San Antonio. The closest ZIP codes are 78256, 78231 and 78255. 10,992 people live here in 5,716 households. With about 386 people per square mile it is lightly settled, and most households rent (36% own). Median household income is $81,301, close to the Texas median of $78,476; 35% of residents moved in during the past year.
Quick facts
- Mailing city: San Antonio, TX
- County: Bexar County
- Metro area: San Antonio
- Land area: 28 sq mi
- Population: 10,992
- Median household income: $81,301
- Carrier routes: 9 (7,778 homes)
Key figures
| Measure | Value |
|---|---|
| Residents | 10,992 |
| Households | 5,716 |
| Median household income | $81,301 |
| Income per person | $73,622 |
| Median age | 34 |
| Homeowners | 36.4% |
| Median home value | $670,400 |
| Median rent | $1,689 |
| Bachelor's degree or higher | 59.9% |
| Average commute (minutes) | 24.3 |
| Households with kids under 18 | 16.5% |
| Moved in the past year | 34.9% |
| Below the poverty line | 5.8% |
| Broadband internet | 97.0% |
| Speak a non-English language at home | 38.7% |
Household income
| % of households | Value |
|---|---|
| <$10K | 4.3% |
| $10–15K | 1.3% |
| $15–25K | 2.9% |
| $25–35K | 4.9% |
| $35–50K | 9.1% |
| $50–75K | 21.7% |
| $75–100K | 16.3% |
| $100–150K | 17.8% |
| $150–200K | 3.9% |
| $200K+ | 17.7% |
Age
| % of all residents | Value |
|---|---|
| <10 | 7.7% |
| 10–19 | 9.1% |
| 20–24 | 7.6% |
| 25–34 | 28.3% |
| 35–44 | 11.6% |
| 45–54 | 10.6% |
| 55–64 | 8.6% |
| 65–74 | 8.6% |
| 75+ | 7.8% |
Tenure
| % of housing units | Value |
|---|---|
| Owned, with mortgage | 14.3% |
| Owned outright | 16.0% |
| Rented | 53.0% |
| Vacant | 16.8% |
Type of building
| % of housing units | Value |
|---|---|
| Detached house | 28.4% |
| Townhome | 0.4% |
| 2–4 units | 2.4% |
| 5–19 units | 15.5% |
| 20+ units | 50.5% |
| Mobile / other | 2.8% |
Businesses in 78257
648 business establishments with 13,340 employees (ZIP Codes Business Patterns 2023).
- Health Care and Social Assistance: 98
- Accommodation and Food Services: 92
- Retail Trade: 90
- Professional, Scientific, and Technical Services: 86
- Other Services (except Public Administration): 57
- Real Estate and Rental and Leasing: 53
- Finance and Insurance: 46
- Administrative and Support and Waste Management and Remediation Services: 28
EDDM carrier routes
78257 has 9 USPS carrier routes with 7,778 residential and 633 business mailboxes. Open the EDDM route map.
Carrier routes in 78257
78257 has 9 USPS carrier routes (9 rural (R)) with 7,778 residential and 633 business mailboxes. Routes range from 192 homes (R274) to 1,511 homes (R207); the median route has 762 homes. The Census counted 5,716 households in 78257 (2020–2024 average); USPS counts current mailboxes, including new and vacant homes.
| Homes per route | Routes |
|---|---|
| 1–249 | 1 |
| 250–499 | 1 |
| 500–749 | 2 |
| 750–999 | 2 |
| 1,000–1,499 | 1 |
| 1,500+ | 2 |
Best routes in 78257 for…
Highest income
For bigger-ticket offers: remodeling, pools, financial planning, private schools.
- Route R046 — Est. median household income $155,207, 551 homes
- Route R232 — Est. median household income $142,812, 467 homes
- Route R274 — Est. median household income $136,006, 192 homes
- Route R002 — Est. median household income $120,110, 572 homes
- Route R053 — Est. median household income $113,446, 883 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.
- Route R046 — Est. families with children under 18 29.6%, 551 homes
- Route R053 — Est. families with children under 18 28.6%, 883 homes
- Route R232 — Est. families with children under 18 27.6%, 467 homes
- Route R274 — Est. families with children under 18 27.1%, 192 homes
- Route R002 — Est. families with children under 18 26.0%, 572 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.
- Route R046 — Est. owner-occupied homes 88.5%, 551 homes
- Route R002 — Est. owner-occupied homes 80.5%, 572 homes
- Route R053 — Est. owner-occupied homes 75.7%, 883 homes
- Route R232 — Est. owner-occupied homes 75.0%, 467 homes
- Route R274 — Est. owner-occupied homes 61.8%, 192 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.
- Route R207 — Est. residents who moved in the past year 45.9%, 1,511 homes
- Route R165 — Est. residents who moved in the past year 45.7%, 1,333 homes
- Route R251 — Est. residents who moved in the past year 45.1%, 1,507 homes
- Route R256 — Est. residents who moved in the past year 45.1%, 762 homes
- Route R053 — Est. residents who moved in the past year 17.3%, 883 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.
- Route R251 — Est. homes built 2010 or later 79.0%, 1,507 homes
- Route R256 — Est. homes built 2010 or later 79.0%, 762 homes
- Route R207 — Est. homes built 2010 or later 78.5%, 1,511 homes
- Route R165 — Est. homes built 2010 or later 78.1%, 1,333 homes
- Route R053 — Est. homes built 2010 or later 61.0%, 883 homes
Select these 5 routes on the route map
Most businesses
For B2B offers: office supplies, cleaning, IT, catering and commercial services.
- Route R274 — USPS business mailboxes 215, 192 homes
- Route R232 — USPS business mailboxes 152, 467 homes
- Route R053 — USPS business mailboxes 125, 883 homes
- Route R165 — USPS business mailboxes 49, 1,333 homes
- Route R046 — USPS business mailboxes 44, 551 homes
Select these 5 routes on the route map
Every carrier route in 78257
| Route | Type | Homes | Businesses | Est. median income | Est. owners | Est. families with kids | Est. moved in past year |
|---|---|---|---|---|---|---|---|
| R002 | Rural | 572 | 0 | $120,110 | 80.5% | 26.0% | 16.4% |
| R046 | Rural | 551 | 44 | $155,207 | 88.5% | 29.6% | 12.0% |
| R053 | Rural | 883 | 125 | $113,446 | 75.7% | 28.6% | 17.3% |
| R165 | Rural | 1,333 | 49 | $76,550 | 14.3% | 11.9% | 45.7% |
| R207 | Rural | 1,511 | 9 | $76,519 | 14.0% | 12.0% | 45.9% |
| R232 | Rural | 467 | 152 | $142,812 | 75.0% | 27.6% | 14.9% |
| R251 | Rural | 1,507 | 4 | $75,859 | 14.8% | 11.8% | 45.1% |
| R256 | Rural | 762 | 35 | $75,859 | 14.8% | 11.8% | 45.1% |
| R274 | Rural | 192 | 215 | $136,006 | 61.8% | 27.1% | 17.0% |
Income, owners, families and movers are estimates for each route (how we estimate them); mailbox counts are current USPS figures. Open 78257 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
- 78256 — San Antonio city, TX (3.2 mi)
- 78231 — Shavano Park city, TX (5.1 mi)
- 78255 — Cross Mountain CDP, TX (5.1 mi)
- 78248 — San Antonio city, TX (5.2 mi)
- 78258 — San Antonio city, TX (5.6 mi)
- 78249 — San Antonio city, TX (5.9 mi)
- 78260 — Timberwood Park CDP, TX (6.4 mi)
- 78230 — San Antonio city, TX (7.1 mi)
Areas that include 78257
- San Antonio, TX ZIP codes — 64 ZIP codes
- Bexar County ZIP codes — 76 ZIP codes
- San Antonio ZIP code map — 121 ZIP codes
- Texas ZIP code data
Where it ranks
- No. 1 of 101: highest median home value in the San Antonio area
- No. 5 of 104: highest share of residents who moved in during the past year in the San Antonio area
- No. 24 of 104: lowest median age in the San Antonio area
- No. 10 of 104: fastest population growth in the San Antonio area
- No. 1 of 71: highest median home value in Bexar County
- No. 5 of 74: highest share of residents who moved in during the past year in Bexar County
- No. 23 of 74: lowest median age in Bexar County
- No. 8 of 74: fastest population growth in Bexar County
- No. 1 of 61: highest median home value in San Antonio, TX
- No. 4 of 63: highest share of residents who moved in during the past year in San Antonio, TX
- No. 6 of 63: fastest population growth in San Antonio, TX
Mail every home in 78257
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) 78257, which approximates the USPS ZIP code area. Census figures: American Community Survey 5-year estimates, 2020–2024.
Frequently asked questions
- What city is 78257 in?
- 78257 is a San Antonio, TX mailing address. By land area, 42% lies inside San Antonio; the rest is outside any Census-defined city or community.
- What county is 78257 in?
- 78257 is in Bexar County.
- What is the population of 78257?
- About 10,992 people (±1,359), according to the Census Bureau's American Community Survey 5-year estimates for 2020–2024. The 2020 Census counted 12,173.
- What is the median household income in 78257?
- $81,301 (±$13,084), 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 78257?
- 9 USPS carrier routes with 7,778 residential and 633 business mailboxes (8,412 in all), from the route data stored by EDDM2GO. An EDDM mailing can target any combination of these routes.
- What ZIP codes are near 78257?
- The closest, measured center to center: 78256 (3.2 mi, San Antonio), 78231 (5.1 mi, Shavano Park), 78255 (5.1 mi, Cross Mountain), 78248 (5.2 mi, San Antonio), 78258 (5.6 mi, San Antonio) and 78249 (5.9 mi, San Antonio).
This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.