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Where 78724 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 78724 into a pocket calculator and turn it upside down: hZLBL — not quite a word, sorry.
- ➕ As a number, 78,724 = 2 × 2 × 19681. Its digits add up to 28, a total 1,520 other ZIP codes share.
- 💾In binary, the way a computer stores it:
10011001110000100 - 🏠 Its numerical neighbours: 78723 (Austin, TX, 4 mi away) and 78725 (Austin, TX, 4 mi away).
- 🔄 Backwards, 78724 becomes 42787, which is not a ZIP code at all.
- 👥 25 other ZIP codes are made of exactly the same digits (27847, 27874, 28747, 28774, 47728, 47872, …). The farthest-flung twin is 27847 in Kelford, NC, 1,245 miles away.
- 🧭 Farther south than 92% of all ZIP codes, and farther west than 76%.
- 🎯661 miles south of the geographic center of the Lower 48, near Lebanon, Kansas.
- 🌏 Dig straight through the Earth from 78724 and you would come out at 30.29°S, 82.38°E — 1,462 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 24.9 square miles of land, 78724 is bigger than 42% of ZIP codes — room for about 19 Central Parks.
- Working out the sun…
- Checking the USGS…
Source: USGS.
People and housing
| Population | 31,103This ZIP31,103 |
|---|---|
| Households | 10,379This ZIP10,379 |
| Housing units | 10,819This ZIP10,819 |
| Median age | 32.2This ZIP32.2Texas35.6US 38.9 |
| Median household income | $77,926This ZIP$77,926Texas$78,476US $80,734 |
| Median home value | $344,000This ZIP$344,000Texas$283,800US $332,700 |
| Median gross rent | $1,649This ZIP$1,649Texas$1,403US $1,413 |
| Bachelor's degree or higher | 31.6%This ZIP31.6% |
| Mean commute | 27.6 minThis ZIP27.6 min |
| Population density | 1,247.1 / sq miThis ZIP1,247.1 / sq mi |
Business and tax activity
| Business establishments | 325This ZIP325 |
|---|---|
| Employees | 10,177This ZIP10,177 |
| Annual payroll | $874,501,000This ZIP$874,501,000 |
| Tax returns filed | 13,760This ZIP13,760 |
| Total adjusted gross income | $794,178,000This ZIP$794,178,000 |
Land area
| Land area | 24.94 sq miThis ZIP24.94 sq mi |
|---|---|
| Water area | 1.98 sq miThis ZIP1.98 sq mi |
Other place names in 78724
Census places whose land this ZIP code overlaps. The Postal Service may accept other city names in an address, too.
ZIP codes near 78724
| ZIP | City | Distance |
|---|---|---|
78723 | Austin, TX | 4.1 mi |
78721 | Austin, TX | 4.2 mi |
78742 | Austin, TX | 4.3 mi |
78725 | Austin, TX | 4.4 mi |
78763 | Austin, TX | 4.6 mi |
78754 | Austin, TX | 4.6 mi |
78722 | Austin, TX | 5.8 mi |
78752 | Austin, TX | 5.8 mi |
78702 | Austin, TX | 6.1 mi |
78751 | Austin, TX | 6.4 mi |
Find every ZIP code within 10 miles of 78724 →
Questions about this ZIP code
Where is ZIP code 78724?
78724 is in Austin, Texas, in Travis County, part of the Austin-Round Rock-San Marcos, TX metropolitan area. Its published point location is 30.2927, -97.6179.
What county is 78724 in?
78724 lies in Travis County.
What area code is 78724?
Austin uses area codes 512 and 737, from NANPA's telephone records.
What time zone is 78724 in?
78724 uses America/Chicago.
How many people live in 78724?
About 31,103 people live in ZIP code 78724, in 10,379 households, at 1,247.1 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 78724?
$77,926 a year, against $78,476 across Texas.
What ZIP codes are near 78724?
The closest are 78723 (4.1 mi), 78721 (4.2 mi), 78742 (4.3 mi), 78725 (4.4 mi) and 78763 (4.6 mi).
Is 78724 a PO Box ZIP code?
78724 is a standard ZIP code. A normal ZIP code with street delivery.
Download or cite
Cite this page
zipcodes.pro. “78724 ZIP Code — Austin, Texas (Travis County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/78724
Machine-readable version of these facts:
curl https://zipcodes.pro/zip/78724.jsonUnderlying data is public domain or openly licensed — sources, vintages and licences.