78204 ZIP Code, San Antonio, TX
78204 is a ZIP code in San Antonio, Texas in Bexar County. It covers 2.7 square miles of land, around downtown San Antonio. The closest ZIP codes are 78225, 78205 and 78207. 11,983 people live here in 5,103 households. At about 4,420 people per square mile it is built up to city-neighborhood density, and owners and renters are mixed (45% own). Median household income is $60,255, below the Texas median of $78,476; 23% of residents moved in during the past year.
Quick facts
- Mailing city: San Antonio, TX
- County: Bexar County
- Metro area: San Antonio
- Land area: 2.7 sq mi
- Population: 11,983
- Median household income: $60,255
- Carrier routes: 8 (6,572 homes)
Key figures
| Measure | Value |
|---|---|
| Residents | 11,983 |
| Households | 5,103 |
| Median household income | $60,255 |
| Income per person | $36,297 |
| Median age | 36.2 |
| Homeowners | 45.3% |
| Median home value | $173,100 |
| Median rent | $1,481 |
| Bachelor's degree or higher | 24.7% |
| Average commute (minutes) | 21.6 |
| Households with kids under 18 | 23.5% |
| Moved in the past year | 22.5% |
| Below the poverty line | 17.5% |
| Broadband internet | 89.6% |
| Speak a non-English language at home | 50.4% |
Household income
| % of households | Value |
|---|---|
| <$10K | 6.3% |
| $10–15K | 4.8% |
| $15–25K | 8.5% |
| $25–35K | 12.8% |
| $35–50K | 9.8% |
| $50–75K | 17.8% |
| $75–100K | 11.6% |
| $100–150K | 13.3% |
| $150–200K | 7.8% |
| $200K+ | 7.3% |
Age
| % of all residents | Value |
|---|---|
| <10 | 12.9% |
| 10–19 | 9.0% |
| 20–24 | 4.6% |
| 25–34 | 20.9% |
| 35–44 | 13.5% |
| 45–54 | 11.4% |
| 55–64 | 13.6% |
| 65–74 | 6.7% |
| 75+ | 7.3% |
Tenure
| % of housing units | Value |
|---|---|
| Owned, with mortgage | 11.9% |
| Owned outright | 24.5% |
| Rented | 43.4% |
| Vacant | 20.2% |
Type of building
| % of housing units | Value |
|---|---|
| Detached house | 57.3% |
| Townhome | 3.1% |
| 2–4 units | 5.3% |
| 5–19 units | 4.0% |
| 20+ units | 29.6% |
| Mobile / other | 0.7% |
Businesses in 78204
262 business establishments with 8,463 employees (ZIP Codes Business Patterns 2023).
- Professional, Scientific, and Technical Services: 56
- Accommodation and Food Services: 47
- Other Services (except Public Administration): 29
- Health Care and Social Assistance: 24
- Retail Trade: 21
- Wholesale Trade: 13
- Manufacturing: 12
- Construction: 11
EDDM carrier routes
78204 has 8 USPS carrier routes with 6,572 residential and 506 business mailboxes. Open the EDDM route map.
Carrier routes in 78204
78204 has 8 USPS carrier routes (8 city (C)) with 6,572 residential and 506 business mailboxes. Routes range from 462 homes (C006) to 1,607 homes (C015); the median route has 669 homes. The Census counted 5,103 households in 78204 (2020–2024 average); USPS counts current mailboxes, including new and vacant homes.
| Homes per route | Routes |
|---|---|
| 1–249 | 0 |
| 250–499 | 2 |
| 500–749 | 3 |
| 750–999 | 1 |
| 1,000–1,499 | 1 |
| 1,500+ | 1 |
Best routes in 78204 for…
Highest income
For bigger-ticket offers: remodeling, pools, financial planning, private schools.
- Route C005 — Est. median household income $91,135, 483 homes
- Route C015 — Est. median household income $81,055, 1,607 homes
- Route C014 — Est. median household income $65,874, 1,298 homes
- Route C001 — Est. median household income $63,700, 783 homes
- Route C009 — Est. median household income $62,676, 653 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 C006 — Est. families with children under 18 39.9%, 462 homes
- Route C001 — Est. families with children under 18 27.5%, 783 homes
- Route C008 — Est. families with children under 18 27.4%, 602 homes
- Route C003 — Est. families with children under 18 27.0%, 684 homes
- Route C009 — Est. families with children under 18 18.7%, 653 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 C006 — Est. owner-occupied homes 63.9%, 462 homes
- Route C003 — Est. owner-occupied homes 63.3%, 684 homes
- Route C005 — Est. owner-occupied homes 63.3%, 483 homes
- Route C009 — Est. owner-occupied homes 54.7%, 653 homes
- Route C001 — Est. owner-occupied homes 51.7%, 783 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 C015 — Est. residents who moved in the past year 23.6%, 1,607 homes
- Route C008 — Est. residents who moved in the past year 22.3%, 602 homes
- Route C014 — Est. residents who moved in the past year 21.6%, 1,298 homes
- Route C001 — Est. residents who moved in the past year 21.2%, 783 homes
- Route C005 — Est. residents who moved in the past year 12.6%, 483 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 C015 — Est. homes built 2010 or later 48.6%, 1,607 homes
- Route C009 — Est. homes built 2010 or later 27.7%, 653 homes
- Route C014 — Est. homes built 2010 or later 24.0%, 1,298 homes
- Route C001 — Est. homes built 2010 or later 17.2%, 783 homes
- Route C005 — Est. homes built 2010 or later 16.1%, 483 homes
Select these 5 routes on the route map
Most businesses
For B2B offers: office supplies, cleaning, IT, catering and commercial services.
- Route C014 — USPS business mailboxes 134, 1,298 homes
- Route C015 — USPS business mailboxes 108, 1,607 homes
- Route C009 — USPS business mailboxes 77, 653 homes
- Route C008 — USPS business mailboxes 61, 602 homes
- Route C001 — USPS business mailboxes 59, 783 homes
Select these 5 routes on the route map
Every carrier route in 78204
| Route | Type | Homes | Businesses | Est. median income | Est. owners | Est. families with kids | Est. moved in past year |
|---|---|---|---|---|---|---|---|
| C001 | City | 783 | 59 | $63,700 | 51.7% | 27.5% | 21.2% |
| C003 | City | 684 | 1 | $37,087 | 63.3% | 27.0% | 12.4% |
| C005 | City | 483 | 23 | $91,135 | 63.3% | 10.4% | 12.6% |
| C006 | City | 462 | 43 | $57,889 | 63.9% | 39.9% | 7.6% |
| C008 | City | 602 | 61 | $38,535 | 50.0% | 27.4% | 22.3% |
| C009 | City | 653 | 77 | $62,676 | 54.7% | 18.7% | 10.9% |
| C014 | City | 1,298 | 134 | $65,874 | 46.4% | 9.9% | 21.6% |
| C015 | City | 1,607 | 108 | $81,055 | 35.6% | 13.8% | 23.6% |
Income, owners, families and movers are estimates for each route (how we estimate them); mailbox counts are current USPS figures. Open 78204 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
- 78225 — San Antonio city, TX (1.7 mi)
- 78205 — San Antonio city, TX (1.8 mi)
- 78207 — San Antonio city, TX (1.8 mi)
- 78210 — San Antonio city, TX (2.5 mi)
- 78203 — San Antonio city, TX (2.8 mi)
- 78215 — San Antonio city, TX (2.9 mi)
- 78202 — San Antonio city, TX (3.1 mi)
- 78208 — San Antonio city, TX (3.7 mi)
Areas that include 78204
- 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. 14 of 104: highest share of residents who moved in during the past year in the San Antonio area
- No. 14 of 74: highest share of residents who moved in during the past year in Bexar County
- No. 13 of 63: highest share of residents who moved in during the past year in San Antonio, TX
Mail every home in 78204
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) 78204, which approximates the USPS ZIP code area. Census figures: American Community Survey 5-year estimates, 2020–2024.
Frequently asked questions
- What city is 78204 in?
- 78204 is a San Antonio, TX mailing address. By land area, 100% lies inside San Antonio.
- What county is 78204 in?
- 78204 is in Bexar County.
- What is the population of 78204?
- About 11,983 people (±1,623), according to the Census Bureau's American Community Survey 5-year estimates for 2020–2024. The 2020 Census counted 11,298.
- What is the median household income in 78204?
- $60,255 (±$15,567), 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 78204?
- 8 USPS carrier routes with 6,572 residential and 506 business mailboxes (7,078 in all), from the route data stored by EDDM2GO. An EDDM mailing can target any combination of these routes.
- What ZIP codes are near 78204?
- The closest, measured center to center: 78225 (1.7 mi, San Antonio), 78205 (1.8 mi, San Antonio), 78207 (1.8 mi, San Antonio), 78210 (2.5 mi, San Antonio), 78203 (2.8 mi, San Antonio) and 78215 (2.9 mi, San Antonio).
This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.