Every ZIP code in the United States, with weather, radar, trivia and the numbers behind it. Five digits since 1963!

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/78642

78642

ZIP 78642 is Liberty Hill, Texas, mostly in Williamson County; area codes 512 and 737; Central time.

Type
Standard
Time zone
America/Chicago
County
Williamson +1 more
Population
26,434
Coordinates
30.6957, -97.9395
☼ Live from 78642 — Liberty Hill, TX

Weather right now

Asking the National Weather Service…

NEXRAD radar
Finding the nearest radar…
Local time: —

Where 78642 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 78642
  • 🔢 Type 78642 into a pocket calculator and turn it upside down: ZhgBL — not quite a word, sorry.
  • ➕ As a number, 78,642 = 2 × 3 × 3 × 17 × 257. Its digits add up to 27, a total 1,806 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 10011001100110010
  • 🏠 Its numerical neighbours: 78641 (Leander, TX, 10 mi away) and 78643 (Llano, TX, 46 mi away).
  • 🔄 Backwards, 78642 becomes 24687, which is not a ZIP code at all.
  • 👥 36 other ZIP codes are made of exactly the same digits (24867, 26847, 27846, 27864, 28467, 28647, …). The farthest-flung twin is 27846 in Jamesville, NC, 1,263 miles away.
  • 🧭 Farther south than 91% of all ZIP codes, and farther west than 77%.
  • 🎯632 miles south of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 78642 and you would come out at 30.70°S, 82.06°E — 1,429 miles from Port-aux-Français, French Southern Territories, the nearest big city to that spot.
  • ☀Longest day of the year: 14h 08m of daylight. Shortest: 10h 09m.
  • 📏 At 111.1 square miles of land, 78642 is bigger than 80% of ZIP codes — room for about 84 Central Parks.
🌙 The sky over 78642 today
  • Working out the sun…
🌋 Shake report
  • Checking the USGS…

Source: USGS.

People and housing

Population26,434This ZIP26,434
Households8,696This ZIP8,696
Housing units8,963This ZIP8,963
Median age36.9This ZIP36.9Texas35.6US 38.9
Median household income$132,958This ZIP$132,958Texas$78,476US $80,734
Median home value$506,600This ZIP$506,600Texas$283,800US $332,700
Median gross rent$1,658This ZIP$1,658Texas$1,403US $1,413
Bachelor's degree or higher44.5%This ZIP44.5%
Mean commute35.0 minThis ZIP35.0 min
Population density237.9 / sq miThis ZIP237.9 / sq mi

Business and tax activity

Business establishments635This ZIP635
Employees4,135This ZIP4,135
Annual payroll$217,606,000This ZIP$217,606,000
Tax returns filed13,250This ZIP13,250
Total adjusted gross income$1,831,403,000This ZIP$1,831,403,000

Land area

Land area111.13 sq miThis ZIP111.13 sq mi
Water area0.56 sq miThis ZIP0.56 sq mi

Counties 78642 spans

A ZIP code is a mail route and ignores county lines. Shares are by overlapping land area.

CountyShare of this ZIP
Williamson County 92.0%
Burnet County 8.0%

Other place names in 78642

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

ZIP codes near 78642

ZIPCityDistance
78605 Bertram, TX 8.3 mi
78646 Leander, TX 9.6 mi
78641 Leander, TX 9.6 mi
78628 Georgetown, TX 9.8 mi
78633 Georgetown, TX 11.3 mi
76527 Florence, TX 12.9 mi
78613 Cedar Park, TX 14.9 mi
78630 Cedar Park, TX 14.9 mi
78627 Georgetown, TX 16.2 mi
78608 Briggs, TX 16.3 mi

Find every ZIP code within 10 miles of 78642 →

Questions about this ZIP code

Where is ZIP code 78642?

78642 is in Liberty Hill, Texas, in Williamson County, part of the Austin-Round Rock-San Marcos, TX metropolitan area. Its published point location is 30.6957, -97.9395.

What county is 78642 in?

78642 spans 2 counties: Williamson County and Burnet County. Most of it falls in Williamson County, measured by overlapping land area — the county holding the most land in a ZIP code is not always the one holding the most residents.

What area code is 78642?

Liberty Hill uses area codes 512 and 737, from NANPA's telephone records.

What time zone is 78642 in?

78642 uses America/Chicago.

How many people live in 78642?

About 26,434 people live in ZIP code 78642, in 8,696 households, at 237.9 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 78642?

$132,958 a year, against $78,476 across Texas.

What ZIP codes are near 78642?

The closest are 78605 (8.3 mi), 78646 (9.6 mi), 78641 (9.6 mi), 78628 (9.8 mi) and 78633 (11.3 mi).

Is 78642 a PO Box ZIP code?

78642 is a standard ZIP code. A normal ZIP code with street delivery.

Download or cite

Cite this page

zipcodes.pro. “78642 ZIP Code — Liberty Hill, Texas (Williamson County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/78642

Machine-readable version of these facts:

curl https://zipcodes.pro/zip/78642.json

Underlying data is public domain or openly licensed — sources, vintages and licences.