What city is ZIP code 78731?

78731 is a Austin, Texas ZIP code.

What county is 78731 in?

ZIP code 78731 is in Travis County, Texas.

What time zone is ZIP code 78731 in?

78731 is in the Central Time zone (America/Chicago).

What area code is 78731?

Phone numbers in ZIP code 78731 use area codes 512 and 737.

What is the population of ZIP code 78731?

About 27,507 people live in ZIP code 78731, according to the Census Bureau’s American Community Survey (2020–2024).

What is the median income in 78731?

The median household income in 78731 is $105,494 a year, higher than 87% of Texas ZIP codes.

What ZIP codes are near 78731?

The nearest ZIP codes to 78731 are 73301 (Austin, 1.6 miles), 73344 (Austin, 1.6 miles), 78708 (Austin, 1.6 miles) and 78709 (Austin, 1.6 miles).

ZIP code 78731

Where is ZIP code 78731?

Austin, Texas

Travis County · Standard ZIP code

ZIP code 78731 belongs to Austin, Texas in Travis County. 78731 is a standard ZIP code, so it covers street addresses as well as PO Boxes. It is in the Central Time zone and uses area codes 512 and 737. About 27,507 people live in the 78731 area, where the median household income is $105,494. The closest ZIP codes are 73301 (Austin, 1.6 mi southwest), 73344 (Austin, 1.6 mi southwest) and 78708 (Austin, 1.6 mi southwest).

ZIP code	78731
Type	Standard ZIP code for street addresses and PO Boxes
Status	Active
City	Austin
State	Texas (TX)
County	Travis County
Time zone	Central Time · now
Area codes	512, 737
Coordinates	30.3471, -97.7609 map
3-digit prefix	787

Population and income in 78731

Population	27,507 · higher than 77% of Texas ZIP codes
People per square mile	3,145 · higher than 85% of Texas ZIP codes
Median age	42.3 years · higher than 69% of Texas ZIP codes
Men / women	53% / 48%
Median household income	$105,494 · higher than 87% of Texas ZIP codes
Income per person	$94,483
Below the poverty line	6.0%
Bachelor’s degree or higher	78% of adults 25+
Median home value	$903,200 · higher than 99% of Texas ZIP codes
Median rent	$1,737 a month
Housing units	15,163
Households	14,343 (1.91 people on average)
Owners / renters	53% / 47%
Land area	8.75 sq mi (plus 0.2 sq mi of water)

Source: U.S. Census Bureau, American Community Survey 5-year estimates (2020–2024) for ZIP Code Tabulation Area 78731. Census ZIP areas are close to, but not exactly the same as, USPS delivery areas.

ZIP codes near 78731

ZIP code	City	Distance	Type
73301	Austin, TX	1.6 mi SW	Unique
73344	Austin, TX	1.6 mi SW	Unique
78708	Austin, TX	1.6 mi SW	PO Box only
78709	Austin, TX	1.6 mi SW	PO Box only
78711	Austin, TX	1.6 mi SW	PO Box only
78718	Austin, TX	1.6 mi SW	PO Box only
78720	Austin, TX	1.6 mi SW	PO Box only
78755	Austin, TX	1.6 mi SW	PO Box only
78760	Austin, TX	1.6 mi SW	PO Box only
78761	Austin, TX	1.6 mi SW	PO Box only
78762	Austin, TX	1.6 mi SW	PO Box only
78765	Austin, TX	1.6 mi SW	PO Box only

Straight-line distance between ZIP code center points. Find every ZIP code within 10 miles of 78731 or measure the distance to another ZIP code.

How to address mail to 78731

JANE SMITH
123 MAIN ST
AUSTIN TX 78731

Put the city, the two-letter state code and the ZIP code on the last line. Avoid Camp Mabry: USPS doesn’t recognize it as the city for this ZIP code. Adding the 4-digit ZIP+4 code (78731-XXXX) helps mail sort faster but isn’t required.

Other ZIP codes in Austin, TX

All Austin ZIP codes with population and income →

Questions

What city is ZIP code 78731?: 78731 is a Austin, Texas ZIP code.
What county is 78731 in?: ZIP code 78731 is in Travis County, Texas.
What time zone is ZIP code 78731 in?: 78731 is in the Central Time zone (America/Chicago).
What area code is 78731?: Phone numbers in ZIP code 78731 use area codes 512 and 737.
What is the population of ZIP code 78731?: About 27,507 people live in ZIP code 78731, according to the Census Bureau’s American Community Survey (2020–2024).
What is the median income in 78731?: The median household income in 78731 is $105,494 a year, higher than 87% of Texas ZIP codes.
What ZIP codes are near 78731?: The nearest ZIP codes to 78731 are 73301 (Austin, 1.6 miles), 73344 (Austin, 1.6 miles), 78708 (Austin, 1.6 miles) and 78709 (Austin, 1.6 miles).