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ZIP stands for Zone Improvement Plan. The codes went live on July 1, 1963.The lowest ZIP code is 00501 — the IRS in Holtsville, New York.The highest ZIP code is 99950, in Ketchikan, Alaska.Type 07734 into a calculator and turn it upside down: hELLO. It is Keansburg, New Jersey.12345 belongs to one company: General Electric in Schenectady, New York.The first digit is a region: 0 is New England and New Jersey, 9 is the West Coast, Alaska and Hawaii.Mr. ZIP, the cartoon mailman, was the mascot that sold the idea to America.ZIP+4 arrived in 1983 and can narrow a ZIP down to one side of one block.A ZIP code is a mail route, not a place: plenty of them cross county and even state lines.Play ZIP Hunt: guess the secret ZIP code of the day in six tries.
zipcodes.pro — ZIP/78204

78204

ZIP 78204 is in San Antonio, Texas, in Bexar County; area codes 210 and 726; Central time. San Antonio has 83 ZIP codes in all.

Type
Standard
Time zone
America/Chicago
County
Bexar
Population
11,983
Coordinates
29.4044, -98.5050
☼ Live from 78204 — San Antonio, TX

Weather right now

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Local time: —

Where 78204 is

Approximate ZIP boundary (Census ZCTA 2020). ZIP codes are mail routes, not areas, so the shape shown is the Census tabulation area that approximates it.

★ Weird and wonderful facts about 78204
  • 🔢 Type 78204 into a pocket calculator and turn it upside down: hOZBL — not quite a word, sorry.
  • ➕ As a number, 78,204 = 2 × 2 × 3 × 7 × 7 × 7 × 19. Its digits add up to 21, a total 2,594 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 10011000101111100
  • 🏠 Its numerical neighbours: 78203 (San Antonio, TX, 3 mi away) and 78205 (San Antonio, TX, 2 mi away).
  • 🔄 Backwards, 78204 becomes 40287 — and that is a real ZIP code: Louisville, KY, 953 miles away.
  • 👥 57 other ZIP codes are made of exactly the same digits (02478, 02748, 02874, 04287, 07428, 07842, …). The farthest-flung twin is 04287 in Bowdoin, ME, 1,862 miles away.
  • 🧭 Farther south than 95% of all ZIP codes, and farther west than 78%.
  • 🎯720 miles south of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 78204 and you would come out at 29.40°S, 81.49°E — 1,500 miles from Port-aux-Français, French Southern Territories, the nearest big city to that spot.
  • ☀Longest day of the year: 14h 02m of daylight. Shortest: 10h 15m.
  • 📏 At 2.7 square miles of land, 78204 is bigger than 14% of ZIP codes — room for about 2.1 Central Parks.
🌙 The sky over 78204 today
  • Working out the sun…
🌋 Shake report
  • Checking the USGS…

Source: USGS.

People and housing

Population11,983This ZIP11,983
Households5,103This ZIP5,103
Housing units6,402This ZIP6,402
Median age36.2This ZIP36.2Texas35.6US 38.9
Median household income$60,255This ZIP$60,255Texas$78,476US $80,734
Median home value$173,100This ZIP$173,100Texas$283,800US $332,700
Median gross rent$1,481This ZIP$1,481Texas$1,403US $1,413
Bachelor's degree or higher24.7%This ZIP24.7%
Mean commute21.6 minThis ZIP21.6 min
Population density4,420.1 / sq miThis ZIP4,420.1 / sq mi

Business and tax activity

Business establishments262This ZIP262
Employees8,463This ZIP8,463
Annual payroll$653,915,000This ZIP$653,915,000
Tax returns filed5,520This ZIP5,520
Total adjusted gross income$372,830,000This ZIP$372,830,000

Land area

Land area2.71 sq miThis ZIP2.71 sq mi
Water area0.08 sq miThis ZIP0.08 sq mi

Other place names in 78204

Census places whose land this ZIP code overlaps. The Postal Service may accept other city names in an address, too.

ZIP codes near 78204

ZIPCityDistance
78288 San Antonio, TX 1.5 mi
78225 San Antonio, TX 1.7 mi
78205 San Antonio, TX 1.8 mi
78207 San Antonio, TX 1.8 mi
78210 San Antonio, TX 2.5 mi
78284 San Antonio, TX 2.8 mi
78203 San Antonio, TX 2.8 mi
78215 San Antonio, TX 2.9 mi
78202 San Antonio, TX 3.1 mi
78206 San Antonio, TX 3.5 mi

Find every ZIP code within 10 miles of 78204 →

Questions about this ZIP code

Where is ZIP code 78204?

78204 is in San Antonio, Texas, in Bexar County, part of the San Antonio-New Braunfels, TX metropolitan area. Its published point location is 29.4044, -98.5050.

What county is 78204 in?

78204 lies in Bexar County.

What area code is 78204?

San Antonio uses area codes 210 and 726, from NANPA's telephone records.

What time zone is 78204 in?

78204 uses America/Chicago.

How many people live in 78204?

About 11,983 people live in ZIP code 78204, in 5,103 households, at 4,420.1 people per square mile. These are American Community Survey 5-year estimates for the ZIP Code Tabulation Area, not a headcount.

What is the median household income in 78204?

$60,255 a year, against $78,476 across Texas.

What ZIP codes are near 78204?

The closest are 78288 (1.5 mi), 78225 (1.7 mi), 78205 (1.8 mi), 78207 (1.8 mi) and 78210 (2.5 mi).

Is 78204 a PO Box ZIP code?

78204 is a standard ZIP code. A normal ZIP code with street delivery.

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Cite this page

zipcodes.pro. “78204 ZIP Code — San Antonio, Texas (Bexar County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/78204

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