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Where 78705 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 78705 into a pocket calculator and turn it upside down: SOLBL — not quite a word, sorry.
- ➕ As a number, 78,705 = 3 × 3 × 3 × 5 × 11 × 53. Its digits add up to 27, a total 1,806 other ZIP codes share.
- 💾In binary, the way a computer stores it:
10011001101110001 - 🏠 Its numerical neighbours: 78704 (Austin, TX, 4 mi away) and 78708 (Austin, TX, 3 mi away).
- 🔄 Backwards, 78705 becomes 50787, which is not a ZIP code at all.
- 👥 30 other ZIP codes are made of exactly the same digits (05778, 07758, 07857, 07875, 08757, 57078, …). The farthest-flung twin is 05778 in Whiting, VT, 1,635 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 78705 and you would come out at 30.29°S, 82.26°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 2.1 square miles of land, 78705 is bigger than 12% of ZIP codes — room for about 1.6 Central Parks.
- Working out the sun…
- Checking the USGS…
Source: USGS.
People and housing
| Population | 33,238This ZIP33,238 |
|---|---|
| Households | 12,136This ZIP12,136 |
| Housing units | 13,619This ZIP13,619 |
| Median age | 21.2This ZIP21.2Texas35.6US 38.9 |
| Median household income | $32,380This ZIP$32,380Texas$78,476US $80,734 |
| Median home value | $647,600This ZIP$647,600Texas$283,800US $332,700 |
| Median gross rent | $1,571This ZIP$1,571Texas$1,403US $1,413 |
| Bachelor's degree or higher | 81.3%This ZIP81.3% |
| Mean commute | 16.5 minThis ZIP16.5 min |
| Population density | 16,057.0 / sq miThis ZIP16,057.0 / sq mi |
Business and tax activity
| Business establishments | 924This ZIP924 |
|---|---|
| Employees | 14,174This ZIP14,174 |
| Annual payroll | $952,848,000This ZIP$952,848,000 |
| Tax returns filed | 7,490This ZIP7,490 |
| Total adjusted gross income | $564,097,000This ZIP$564,097,000 |
Land area
| Land area | 2.07 sq miThis ZIP2.07 sq mi |
|---|---|
| Water area | 0.00 sq mi |
Other place names in 78705
Census places whose land this ZIP code overlaps. The Postal Service may accept other city names in an address, too.
ZIP codes near 78705
| ZIP | City | Distance |
|---|---|---|
78712 | Austin, TX | 0.8 mi |
78751 | Austin, TX | 1.5 mi |
78722 | Austin, TX | 1.5 mi |
78703 | Austin, TX | 1.6 mi |
78701 | Austin, TX | 1.7 mi |
78756 | Austin, TX | 1.9 mi |
78713 | Austin, TX | 1.9 mi |
78714 | Austin, TX | 1.9 mi |
78715 | Austin, TX | 1.9 mi |
78766 | Austin, TX | 1.9 mi |
Find every ZIP code within 10 miles of 78705 →
Questions about this ZIP code
Where is ZIP code 78705?
78705 is in Austin, Texas, in Travis County, part of the Austin-Round Rock-San Marcos, TX metropolitan area. Its published point location is 30.2947, -97.7390.
What county is 78705 in?
78705 lies in Travis County.
What area code is 78705?
Austin uses area codes 512 and 737, from NANPA's telephone records.
What time zone is 78705 in?
78705 uses America/Chicago.
How many people live in 78705?
About 33,238 people live in ZIP code 78705, in 12,136 households, at 16,057.0 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 78705?
$32,380 a year, against $78,476 across Texas.
What ZIP codes are near 78705?
The closest are 78712 (0.8 mi), 78751 (1.5 mi), 78722 (1.5 mi), 78703 (1.6 mi) and 78701 (1.7 mi).
Is 78705 a PO Box ZIP code?
78705 is a standard ZIP code. A normal ZIP code with street delivery.
Download or cite
Cite this page
zipcodes.pro. “78705 ZIP Code — Austin, Texas (Travis County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/78705
Machine-readable version of these facts:
curl https://zipcodes.pro/zip/78705.jsonUnderlying data is public domain or openly licensed — sources, vintages and licences.