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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/78503

78503

ZIP 78503 is in Mcallen, Texas, in Hidalgo County; area code 956; Central time. Mcallen has 5 ZIP codes; the others are 78501, 78502, 78504 and 78505.

Type
Standard
Time zone
America/Chicago
County
Hidalgo
Population
22,621
Coordinates
26.1623, -98.2487
☼ Live from 78503 — Mcallen, TX

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Local time: —

Where 78503 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 78503
  • 🔢 Type 78503 into a pocket calculator and turn it upside down: EOSBL — not quite a word, sorry.
  • ➕ As a number, 78,503 = 29 × 2707. Its digits add up to 23, a total 2,533 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 10011001010100111
  • 🏠 Its numerical neighbours: 78502 (Mcallen, TX, 7 mi away) and 78504 (Mcallen, TX, 8 mi away).
  • 🔄 Backwards, 78503 becomes 30587, which is not a ZIP code at all.
  • 👥 51 other ZIP codes are made of exactly the same digits (03785, 03857, 03875, 05738, 05837, 05873, …). The farthest-flung twin is 05837 in East Haven, VT, 1,947 miles away.
  • 🧭 Farther south than 98% of all ZIP codes, and farther west than 77%.
  • 🎯944 miles south of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 78503 and you would come out at 26.16°S, 81.75°E — 1,377 miles from West Island, Cocos Islands, the nearest big city to that spot.
  • ☀Longest day of the year: 13h 47m of daylight. Shortest: 10h 30m.
  • 📏 At 19.2 square miles of land, 78503 is bigger than 37% of ZIP codes — room for about 15 Central Parks.
🌙 The sky over 78503 today
  • Working out the sun…
🌋 Shake report
  • Checking the USGS…

Source: USGS.

People and housing

Population22,621This ZIP22,621
Households7,247This ZIP7,247
Housing units8,289This ZIP8,289
Median age32.3This ZIP32.3Texas35.6US 38.9
Median household income$53,322This ZIP$53,322Texas$78,476US $80,734
Median home value$150,900This ZIP$150,900Texas$283,800US $332,700
Median gross rent$1,110This ZIP$1,110Texas$1,403US $1,413
Bachelor's degree or higher25.3%This ZIP25.3%
Mean commute19.0 minThis ZIP19.0 min
Population density1,177.6 / sq miThis ZIP1,177.6 / sq mi

Business and tax activity

Business establishments1,028This ZIP1,028
Employees22,478This ZIP22,478
Annual payroll$1,004,204,000This ZIP$1,004,204,000
Tax returns filed9,440This ZIP9,440
Total adjusted gross income$586,194,000This ZIP$586,194,000

Land area

Land area19.21 sq miThis ZIP19.21 sq mi
Water area0.17 sq miThis ZIP0.17 sq mi

Other place names in 78503

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

ZIP codes near 78503

ZIPCityDistance
78505 Mcallen, TX 3.1 mi
78577 Pharr, TX 3.4 mi
78557 Hidalgo, TX 3.7 mi
78501 Mcallen, TX 3.7 mi
78589 San Juan, TX 5.6 mi
78502 Mcallen, TX 7.2 mi
78572 Mission, TX 7.2 mi
78504 Mcallen, TX 8.0 mi
78516 Alamo, TX 8.0 mi
78539 Edinburg, TX 9.1 mi

Find every ZIP code within 10 miles of 78503 →

Questions about this ZIP code

Where is ZIP code 78503?

78503 is in Mcallen, Texas, in Hidalgo County, part of the McAllen-Edinburg-Mission, TX metropolitan area. Its published point location is 26.1623, -98.2487.

What county is 78503 in?

78503 lies in Hidalgo County.

What area code is 78503?

Mcallen uses area code 956, from NANPA's telephone records.

What time zone is 78503 in?

78503 uses America/Chicago.

How many people live in 78503?

About 22,621 people live in ZIP code 78503, in 7,247 households, at 1,177.6 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 78503?

$53,322 a year, against $78,476 across Texas.

What ZIP codes are near 78503?

The closest are 78505 (3.1 mi), 78577 (3.4 mi), 78557 (3.7 mi), 78501 (3.7 mi) and 78589 (5.6 mi).

Is 78503 a PO Box ZIP code?

78503 is a standard ZIP code. A normal ZIP code with street delivery.

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Cite this page

zipcodes.pro. “78503 ZIP Code — Mcallen, Texas (Hidalgo County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/78503

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