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Where 78643 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.
- 🔢 Type 78643 into a pocket calculator and turn it upside down: EhgBL — not quite a word, sorry.
- ➕ 78643 is a prime number. It cannot be divided by anything except 1 and itself. Its digits add up to 28, a total 1,520 other ZIP codes share.
- 💾In binary, the way a computer stores it:
10011001100110011 - 🏠 Its numerical neighbours: 78642 (Liberty Hill, TX, 46 mi away) and 78644 (Lockhart, TX, 83 mi away).
- 🔄 Backwards, 78643 becomes 34687, which is not a ZIP code at all.
- 👥 57 other ZIP codes are made of exactly the same digits (34786, 36748, 36784, 36874, 37684, 37846, …). The farthest-flung twin is 83467 in Salmon, ID, 1,287 miles away.
- 🧭 Farther south than 91% of all ZIP codes, and farther west than 78%.
- 🎯632 miles south of the geographic center of the Lower 48, near Lebanon, Kansas.
- 🌏 Dig straight through the Earth from 78643 and you would come out at 30.68°S, 81.29°E — 1,413 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 712.3 square miles of land, 78643 is bigger than 98% of ZIP codes — room for about 541 Central Parks.
- Working out the sun…
- Checking the USGS…
Source: USGS.
People and housing
| Population | 7,088This ZIP7,088 |
|---|---|
| Households | 3,188This ZIP3,188 |
| Housing units | 4,233This ZIP4,233 |
| Median age | 54.5This ZIP54.5Texas35.6US 38.9 |
| Median household income | $68,365This ZIP$68,365Texas$78,476US $80,734 |
| Median home value | $362,600This ZIP$362,600Texas$283,800US $332,700 |
| Median gross rent | $1,077This ZIP$1,077Texas$1,403US $1,413 |
| Bachelor's degree or higher | 33.4%This ZIP33.4% |
| Mean commute | 23.3 minThis ZIP23.3 min |
| Population density | 10.0 / sq miThis ZIP10.0 / sq mi |
Business and tax activity
| Business establishments | 212This ZIP212 |
|---|---|
| Employees | 1,542This ZIP1,542 |
| Annual payroll | $69,512,000This ZIP$69,512,000 |
| Tax returns filed | 3,220This ZIP3,220 |
| Total adjusted gross income | $291,892,000This ZIP$291,892,000 |
Land area
| Land area | 712.26 sq miThis ZIP712.26 sq mi |
|---|---|
| Water area | 5.51 sq miThis ZIP5.51 sq mi |
Other place names in 78643
Census places whose land this ZIP code overlaps. The Postal Service may accept other city names in an address, too.
ZIP codes near 78643
| ZIP | City | Distance |
|---|---|---|
76885 | Valley Spring, TX | 15.1 mi |
76831 | Castell, TX | 15.4 mi |
78639 | Kingsland, TX | 15.5 mi |
78609 | Buchanan Dam, TX | 16.3 mi |
78607 | Bluffton, TX | 16.6 mi |
78675 | Willow City, TX | 16.9 mi |
78672 | Tow, TX | 19.4 mi |
76832 | Cherokee, TX | 19.7 mi |
76820 | Art, TX | 20.7 mi |
76869 | Pontotoc, TX | 22.2 mi |
Find every ZIP code within 10 miles of 78643 →
Questions about this ZIP code
Where is ZIP code 78643?
78643 is in Llano, Texas, in Llano County. Its published point location is 30.6797, -98.7149.
What county is 78643 in?
78643 lies in Llano County.
What area code is 78643?
Llano uses area code 325, from NANPA's telephone records.
What time zone is 78643 in?
78643 uses America/Chicago.
How many people live in 78643?
About 7,088 people live in ZIP code 78643, in 3,188 households, at 10.0 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 78643?
$68,365 a year, against $78,476 across Texas.
What ZIP codes are near 78643?
The closest are 76885 (15.1 mi), 76831 (15.4 mi), 78639 (15.5 mi), 78609 (16.3 mi) and 78607 (16.6 mi).
Is 78643 a PO Box ZIP code?
78643 is a standard ZIP code. A normal ZIP code with street delivery.
Download or cite
Cite this page
zipcodes.pro. “78643 ZIP Code — Llano, Texas (Llano County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/78643
Machine-readable version of these facts:
curl https://zipcodes.pro/zip/78643.jsonUnderlying data is public domain or openly licensed — sources, vintages and licences.