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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/77456

77456

ZIP 77456 is Markham, Texas, in Matagorda County; area code 979; Central time.

Type
Standard
Time zone
America/Chicago
County
Matagorda
Metro area
Bay City, TX
Population
1,394
Coordinates
28.9274, -96.0897
☼ Live from 77456 — Markham, TX

Weather right now

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Local time: —

Where 77456 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 77456
  • 🔢 Type 77456 into a pocket calculator and turn it upside down: gShLL — not quite a word, sorry.
  • ➕ As a number, 77,456 = 2 × 2 × 2 × 2 × 47 × 103. Its digits add up to 29, a total 1,296 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 10010111010010000
  • 🏠 Its numerical neighbours: 77455 (Louise, TX, 26 mi away) and 77457 (Matagorda, TX, 18 mi away).
  • 🔄 Backwards, 77456 becomes 65477, which is not a ZIP code at all.
  • 👥 30 other ZIP codes are made of exactly the same digits (45677, 45767, 45776, 47567, 47576, 54767, …). The farthest-flung twin is 56477 in Sebeka, MN, 1,226 miles away.
  • 🧭 Farther south than 95% of all ZIP codes, and farther west than 72%.
  • 🎯766 miles south of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 77456 and you would come out at 28.93°S, 83.91°E — 1,426 miles from West Island, Cocos Islands, the nearest big city to that spot.
  • ☀Longest day of the year: 13h 59m of daylight. Shortest: 10h 18m.
  • 📏 At 39.6 square miles of land, 77456 is bigger than 53% of ZIP codes — room for about 30 Central Parks.
🌙 The sky over 77456 today
  • Working out the sun…
🌋 Shake report
  • Checking the USGS…

Source: USGS.

People and housing

Population1,394This ZIP1,394
Households343This ZIP343
Housing units374This ZIP374
Median age18.8This ZIP18.8Texas35.6US 38.9
Median household income$65,284This ZIP$65,284Texas$78,476US $80,734
Median home value$128,600This ZIP$128,600Texas$283,800US $332,700
Bachelor's degree or higher15.2%This ZIP15.2%
Mean commute33.9 minThis ZIP33.9 min
Population density35.2 / sq miThis ZIP35.2 / sq mi

Business and tax activity

Business establishments10This ZIP10
Employees94This ZIP94
Annual payroll$9,275,000This ZIP$9,275,000

Land area

Land area39.57 sq miThis ZIP39.57 sq mi
Water area0.23 sq miThis ZIP0.23 sq mi

Other place names in 77456

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

ZIP codes near 77456

ZIPCityDistance
77440 Elmaton, TX 4.2 mi
77404 Bay City, TX 8.2 mi
77458 Midfield, TX 10.0 mi
77419 Blessing, TX 10.5 mi
77432 Danevang, TX 11.2 mi
77414 Bay City, TX 12.3 mi
77482 Van Vleck, TX 16.0 mi
77483 Wadsworth, TX 16.6 mi
77465 Palacios, TX 17.0 mi
77457 Matagorda, TX 18.0 mi

Find every ZIP code within 10 miles of 77456 →

Questions about this ZIP code

Where is ZIP code 77456?

77456 is in Markham, Texas, in Matagorda County, part of the Bay City, TX micropolitan area. Its published point location is 28.9274, -96.0897.

What county is 77456 in?

77456 lies in Matagorda County.

What area code is 77456?

Markham uses area code 979, from NANPA's telephone records.

What time zone is 77456 in?

77456 uses America/Chicago.

How many people live in 77456?

About 1,394 people live in ZIP code 77456, in 343 households, at 35.2 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 77456?

$65,284 a year, against $78,476 across Texas.

What ZIP codes are near 77456?

The closest are 77440 (4.2 mi), 77404 (8.2 mi), 77458 (10 mi), 77419 (10.5 mi) and 77432 (11.2 mi).

Is 77456 a PO Box ZIP code?

77456 is a standard ZIP code. A normal ZIP code with street delivery.

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zipcodes.pro. “77456 ZIP Code — Markham, Texas (Matagorda County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/77456

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