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Where 78723 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 78723 into a pocket calculator and turn it upside down: EZLBL — not quite a word, sorry.
- ➕ As a number, 78,723 = 3 × 3 × 8747. Its digits add up to 27, a total 1,806 other ZIP codes share.
- 💾In binary, the way a computer stores it:
10011001110000011 - 🏠 Its numerical neighbours: 78722 (Austin, TX, 2 mi away) and 78724 (Austin, TX, 4 mi away).
- 🔄 Backwards, 78723 becomes 32787, which is not a ZIP code at all.
- 👥 23 other ZIP codes are made of exactly the same digits (27837, 27873, 28377, 28737, 28773, 32778, …). The farthest-flung twin is 27837 in Grimesland, NC, 1,239 miles away.
- 🧭 Farther south than 92% of all ZIP codes, and farther west than 76%.
- 🎯660 miles south of the geographic center of the Lower 48, near Lebanon, Kansas.
- 🌏 Dig straight through the Earth from 78723 and you would come out at 30.30°S, 82.31°E — 1,460 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 7.1 square miles of land, 78723 is bigger than 23% of ZIP codes — room for about 5.4 Central Parks.
- Working out the sun…
- Checking the USGS…
Source: USGS.
People and housing
| Population | 38,129This ZIP38,129 |
|---|---|
| Households | 16,669This ZIP16,669 |
| Housing units | 17,744This ZIP17,744 |
| Median age | 34.8This ZIP34.8Texas35.6US 38.9 |
| Median household income | $100,329This ZIP$100,329Texas$78,476US $80,734 |
| Median home value | $562,300This ZIP$562,300Texas$283,800US $332,700 |
| Median gross rent | $1,724This ZIP$1,724Texas$1,403US $1,413 |
| Bachelor's degree or higher | 58.4%This ZIP58.4% |
| Mean commute | 26.1 minThis ZIP26.1 min |
| Population density | 5,401.5 / sq miThis ZIP5,401.5 / sq mi |
Business and tax activity
| Business establishments | 876This ZIP876 |
|---|---|
| Employees | 16,680This ZIP16,680 |
| Annual payroll | $1,029,520,000This ZIP$1,029,520,000 |
| Tax returns filed | 16,730This ZIP16,730 |
| Total adjusted gross income | $1,757,012,000This ZIP$1,757,012,000 |
Land area
| Land area | 7.06 sq miThis ZIP7.06 sq mi |
|---|---|
| Water area | 0.00 sq mi |
Other place names in 78723
Census places whose land this ZIP code overlaps. The Postal Service may accept other city names in an address, too.
ZIP codes near 78723
| ZIP | City | Distance |
|---|---|---|
78722 | Austin, TX | 2.0 mi |
78752 | Austin, TX | 2.2 mi |
78751 | Austin, TX | 2.3 mi |
78721 | Austin, TX | 2.3 mi |
78712 | Austin, TX | 3.1 mi |
78705 | Austin, TX | 3.2 mi |
78702 | Austin, TX | 3.3 mi |
78756 | Austin, TX | 3.5 mi |
78710 | Austin, TX | 3.7 mi |
78701 | Austin, TX | 4.1 mi |
Find every ZIP code within 10 miles of 78723 →
Questions about this ZIP code
Where is ZIP code 78723?
78723 is in Austin, Texas, in Travis County, part of the Austin-Round Rock-San Marcos, TX metropolitan area. Its published point location is 30.3042, -97.6857.
What county is 78723 in?
78723 lies in Travis County.
What area code is 78723?
Austin uses area codes 512 and 737, from NANPA's telephone records.
What time zone is 78723 in?
78723 uses America/Chicago.
How many people live in 78723?
About 38,129 people live in ZIP code 78723, in 16,669 households, at 5,401.5 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 78723?
$100,329 a year, against $78,476 across Texas.
What ZIP codes are near 78723?
The closest are 78722 (2 mi), 78752 (2.2 mi), 78751 (2.3 mi), 78721 (2.3 mi) and 78712 (3.1 mi).
Is 78723 a PO Box ZIP code?
78723 is a standard ZIP code. A normal ZIP code with street delivery.
Download or cite
Cite this page
zipcodes.pro. “78723 ZIP Code — Austin, Texas (Travis County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/78723
Machine-readable version of these facts:
curl https://zipcodes.pro/zip/78723.jsonUnderlying data is public domain or openly licensed — sources, vintages and licences.