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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/77503

77503

ZIP 77503 is in Pasadena, Texas, in Harris County; area codes 713, 832, 346 and 281; Central time. Pasadena has 8 ZIP codes in all.

Type
Standard
Time zone
America/Chicago
County
Harris
Population
23,866
Coordinates
29.6906, -95.1570
☼ Live from 77503 — Pasadena, TX

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Where 77503 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 77503
  • 🔢 Type 77503 into a pocket calculator and turn it upside down: EOSLL — not quite a word, sorry.
  • ➕ As a number, 77,503 = 17 × 47 × 97. Its digits add up to 22, a total 2,607 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 10010111010111111
  • 🏠 Its numerical neighbours: 77502 (Pasadena, TX, 3 mi away) and 77504 (Pasadena, TX, 4 mi away).
  • 🔄 Backwards, 77503 becomes 30577 — and that is a real ZIP code: Toccoa, GA, 769 miles away.
  • 👥 33 other ZIP codes are made of exactly the same digits (05737, 05773, 07735, 07753, 30577, 30757, …). The farthest-flung twin is 05737 in Chittenden, VT, 1,562 miles away.
  • 🧭 Farther south than 94% of all ZIP codes, and farther west than 69%.
  • 🎯727 miles south of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 77503 and you would come out at 29.69°S, 84.84°E — 1,435 miles from West Island, Cocos Islands, the nearest big city to that spot.
  • ☀Longest day of the year: 14h 03m of daylight. Shortest: 10h 14m.
  • 📏 At 6.3 square miles of land, 77503 is bigger than 21% of ZIP codes — room for about 4.8 Central Parks.
🌙 The sky over 77503 today
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🌋 Shake report
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Source: USGS.

People and housing

Population23,866This ZIP23,866
Households7,949This ZIP7,949
Housing units8,617This ZIP8,617
Median age33.1This ZIP33.1Texas35.6US 38.9
Median household income$66,797This ZIP$66,797Texas$78,476US $80,734
Median home value$182,500This ZIP$182,500Texas$283,800US $332,700
Median gross rent$1,200This ZIP$1,200Texas$1,403US $1,413
Bachelor's degree or higher10.5%This ZIP10.5%
Mean commute26.7 minThis ZIP26.7 min
Population density3,763.8 / sq miThis ZIP3,763.8 / sq mi

Business and tax activity

Business establishments415This ZIP415
Employees13,968This ZIP13,968
Annual payroll$1,118,611,000This ZIP$1,118,611,000
Tax returns filed10,280This ZIP10,280
Total adjusted gross income$492,017,000This ZIP$492,017,000

Land area

Land area6.34 sq miThis ZIP6.34 sq mi
Water area0.05 sq miThis ZIP0.05 sq mi

Other place names in 77503

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

ZIP codes near 77503

ZIPCityDistance
77536 Deer Park, TX 2.4 mi
77502 Pasadena, TX 2.7 mi
77506 Pasadena, TX 2.8 mi
77505 Pasadena, TX 3.1 mi
77501 Pasadena, TX 3.1 mi
77504 Pasadena, TX 3.5 mi
77587 South Houston, TX 4.7 mi
77015 Houston, TX 5.2 mi
77017 Houston, TX 5.6 mi
77034 Houston, TX 5.7 mi

Find every ZIP code within 10 miles of 77503 →

Questions about this ZIP code

Where is ZIP code 77503?

77503 is in Pasadena, Texas, in Harris County, part of the Houston-Pasadena-The Woodlands, TX metropolitan area. Its published point location is 29.6906, -95.1570.

What county is 77503 in?

77503 lies in Harris County.

What area code is 77503?

Pasadena uses area codes 713, 832, 346 and 281, from NANPA's telephone records.

What time zone is 77503 in?

77503 uses America/Chicago.

How many people live in 77503?

About 23,866 people live in ZIP code 77503, in 7,949 households, at 3,763.8 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 77503?

$66,797 a year, against $78,476 across Texas.

What ZIP codes are near 77503?

The closest are 77536 (2.4 mi), 77502 (2.7 mi), 77506 (2.8 mi), 77505 (3.1 mi) and 77501 (3.1 mi).

Is 77503 a PO Box ZIP code?

77503 is a standard ZIP code. A normal ZIP code with street delivery.

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Cite this page

zipcodes.pro. “77503 ZIP Code — Pasadena, Texas (Harris County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/77503

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