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Where 78751 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 78751 into a pocket calculator and turn it upside down: ISLBL — not quite a word, sorry.
- ➕ As a number, 78,751 = 61 × 1291. Its digits add up to 28, a total 1,520 other ZIP codes share.
- 💾In binary, the way a computer stores it:
10011001110011111 - 🏠 Its numerical neighbours: 78750 (Austin, TX, 10 mi away) and 78752 (Austin, TX, 2 mi away).
- 🔄 Backwards, 78751 becomes 15787, which is not a ZIP code at all.
- 👥 17 other ZIP codes are made of exactly the same digits (15778, 17578, 17758, 17857, 18577, 57718, …). The farthest-flung twin is 18577 in Scranton, PA, 1,448 miles away.
- 🧭 Farther south than 92% of all ZIP codes, and farther west than 76%.
- 🎯659 miles south of the geographic center of the Lower 48, near Lebanon, Kansas.
- 🌏 Dig straight through the Earth from 78751 and you would come out at 30.31°S, 82.28°E — 1,459 miles from Port-aux-Français, French Southern Territories, the nearest big city to that spot.
- ☀Longest day of the year: 14h 06m of daylight. Shortest: 10h 11m.
- 📏 At 2.4 square miles of land, 78751 is bigger than 13% of ZIP codes — room for about 1.8 Central Parks.
- Working out the sun…
- Checking the USGS…
Source: USGS.
People and housing
| Population | 16,961This ZIP16,961 |
|---|---|
| Households | 9,917This ZIP9,917 |
| Housing units | 10,482This ZIP10,482 |
| Median age | 31.3This ZIP31.3Texas35.6US 38.9 |
| Median household income | $80,915This ZIP$80,915Texas$78,476US $80,734 |
| Median home value | $852,000This ZIP$852,000Texas$283,800US $332,700 |
| Median gross rent | $1,695This ZIP$1,695Texas$1,403US $1,413 |
| Bachelor's degree or higher | 78.5%This ZIP78.5% |
| Mean commute | 17.2 minThis ZIP17.2 min |
| Population density | 7,023.2 / sq miThis ZIP7,023.2 / sq mi |
Business and tax activity
| Business establishments | 592This ZIP592 |
|---|---|
| Employees | 9,012This ZIP9,012 |
| Annual payroll | $471,341,000This ZIP$471,341,000 |
| Tax returns filed | 8,890This ZIP8,890 |
| Total adjusted gross income | $920,606,000This ZIP$920,606,000 |
Land area
| Land area | 2.42 sq miThis ZIP2.42 sq mi |
|---|---|
| Water area | 0.00 sq mi |
Other place names in 78751
Census places whose land this ZIP code overlaps. The Postal Service may accept other city names in an address, too.
ZIP codes near 78751
| ZIP | City | Distance |
|---|---|---|
78756 | Austin, TX | 1.3 mi |
78705 | Austin, TX | 1.5 mi |
78722 | Austin, TX | 1.5 mi |
78752 | Austin, TX | 1.8 mi |
78712 | Austin, TX | 2.0 mi |
78723 | Austin, TX | 2.3 mi |
78703 | Austin, TX | 2.9 mi |
78710 | Austin, TX | 2.9 mi |
78757 | Austin, TX | 2.9 mi |
78701 | Austin, TX | 3.0 mi |
Find every ZIP code within 10 miles of 78751 →
Questions about this ZIP code
Where is ZIP code 78751?
78751 is in Austin, Texas, in Travis County, part of the Austin-Round Rock-San Marcos, TX metropolitan area. Its published point location is 30.3108, -97.7228.
What county is 78751 in?
78751 lies in Travis County.
What area code is 78751?
Austin uses area codes 512 and 737, from NANPA's telephone records.
What time zone is 78751 in?
78751 uses America/Chicago.
How many people live in 78751?
About 16,961 people live in ZIP code 78751, in 9,917 households, at 7,023.2 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 78751?
$80,915 a year, against $78,476 across Texas.
What ZIP codes are near 78751?
The closest are 78756 (1.3 mi), 78705 (1.5 mi), 78722 (1.5 mi), 78752 (1.8 mi) and 78712 (2 mi).
Is 78751 a PO Box ZIP code?
78751 is a standard ZIP code. A normal ZIP code with street delivery.
Download or cite
Cite this page
zipcodes.pro. “78751 ZIP Code — Austin, Texas (Travis County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/78751
Machine-readable version of these facts:
curl https://zipcodes.pro/zip/78751.jsonUnderlying data is public domain or openly licensed — sources, vintages and licences.