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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/78240

78240

ZIP 78240 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
57,921
Coordinates
29.5253, -98.6044
☼ Live from 78240 — San Antonio, TX

Weather right now

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NEXRAD radar
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Local time: —

Where 78240 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 78240
  • 🔢 Type 78240 into a pocket calculator and turn it upside down: OhZBL — not quite a word, sorry.
  • ➕ As a number, 78,240 = 2 × 2 × 2 × 2 × 2 × 3 × 5 × 163. Its digits add up to 21, a total 2,594 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 10011000110100000
  • 🏠 Its numerical neighbours: 78239 (San Antonio, TX, 15 mi away) and 78241 (San Antonio, TX, 11 mi away).
  • 🔄 Backwards, 78240 becomes 04287 — and that is a real ZIP code: Bowdoin, ME, 1,861 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, 1,861 miles away.
  • 🧭 Farther south than 94% of all ZIP codes, and farther west than 78%.
  • 🎯712 miles south of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 78240 and you would come out at 29.53°S, 81.40°E — 1,490 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 11.2 square miles of land, 78240 is bigger than 29% of ZIP codes — room for about 8.5 Central Parks.
🌙 The sky over 78240 today
  • Working out the sun…
🌋 Shake report
  • Checking the USGS…

Source: USGS.

People and housing

Population57,921This ZIP57,921
Households24,991This ZIP24,991
Housing units28,440This ZIP28,440
Median age33.0This ZIP33.0Texas35.6US 38.9
Median household income$63,351This ZIP$63,351Texas$78,476US $80,734
Median home value$257,500This ZIP$257,500Texas$283,800US $332,700
Median gross rent$1,342This ZIP$1,342Texas$1,403US $1,413
Bachelor's degree or higher38.4%This ZIP38.4%
Mean commute23.5 minThis ZIP23.5 min
Population density5,184.5 / sq miThis ZIP5,184.5 / sq mi

Business and tax activity

Business establishments877This ZIP877
Employees12,883This ZIP12,883
Annual payroll$616,200,000This ZIP$616,200,000
Tax returns filed25,980This ZIP25,980
Total adjusted gross income$1,614,357,000This ZIP$1,614,357,000

Land area

Land area11.17 sq miThis ZIP11.17 sq mi
Water area0.01 sq miThis ZIP0.01 sq mi

Other place names in 78240

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

ZIP codes near 78240

ZIPCityDistance
78229 San Antonio, TX 2.1 mi
78249 San Antonio, TX 2.9 mi
78230 San Antonio, TX 3.2 mi
78238 San Antonio, TX 3.8 mi
78250 San Antonio, TX 4.0 mi
78228 San Antonio, TX 4.9 mi
78213 San Antonio, TX 4.9 mi
78231 San Antonio, TX 5.4 mi
78201 San Antonio, TX 6.0 mi
78251 San Antonio, TX 6.2 mi

Find every ZIP code within 10 miles of 78240 →

Questions about this ZIP code

Where is ZIP code 78240?

78240 is in San Antonio, Texas, in Bexar County, part of the San Antonio-New Braunfels, TX metropolitan area. Its published point location is 29.5253, -98.6044.

What county is 78240 in?

78240 lies in Bexar County.

What area code is 78240?

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

What time zone is 78240 in?

78240 uses America/Chicago.

How many people live in 78240?

About 57,921 people live in ZIP code 78240, in 24,991 households, at 5,184.5 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 78240?

$63,351 a year, against $78,476 across Texas.

What ZIP codes are near 78240?

The closest are 78229 (2.1 mi), 78249 (2.9 mi), 78230 (3.2 mi), 78238 (3.8 mi) and 78250 (4 mi).

Is 78240 a PO Box ZIP code?

78240 is a standard ZIP code. A normal ZIP code with street delivery.

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Cite this page

zipcodes.pro. “78240 ZIP Code — San Antonio, Texas (Bexar County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/78240

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