ZIP code 78681
Where is ZIP code 78681?
Round Rock, Texas
Williamson County · Standard ZIP code
ZIP code 78681 belongs to Round Rock, Texas in Williamson County. 78681 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 56,691 people live in the 78681 area, where the median household income is $137,819. The closest ZIP codes are 78664 (Round Rock, 0.8 mi northeast), 78665 (Round Rock, 0.8 mi northeast) and 78717 (Austin, 4.1 mi west).
| ZIP code | 78681 |
|---|---|
| Type | Standard ZIP code for street addresses and PO Boxes |
| Status | Active |
| City | Round Rock |
| Also accepted | Austin |
| State | Texas (TX) |
| County | Williamson County |
| Time zone | Central Time · now |
| Area codes | 512, 737 |
| Coordinates | 30.5083, -97.6789 map |
| 3-digit prefix | 786 |
Population and income in 78681
| Population | 56,691 · higher than 95% of Texas ZIP codes |
|---|---|
| People per square mile | 2,445 · higher than 80% of Texas ZIP codes |
| Median age | 39.3 years · higher than 55% of Texas ZIP codes |
| Men / women | 51% / 49% |
| Median household income | $137,819 · higher than 96% of Texas ZIP codes |
| Income per person | $59,301 |
| Below the poverty line | 5.5% |
| Bachelor’s degree or higher | 58% of adults 25+ |
| Median home value | $497,300 · higher than 93% of Texas ZIP codes |
| Median rent | $1,963 a month |
| Housing units | 20,781 |
| Households | 20,135 (2.8 people on average) |
| Owners / renters | 74% / 26% |
| Land area | 23.19 sq mi (plus 0.14 sq mi of water) |
Source: U.S. Census Bureau, American Community Survey 5-year estimates (2020–2024) for ZIP Code Tabulation Area 78681. Census ZIP areas are close to, but not exactly the same as, USPS delivery areas.
ZIP codes near 78681
| ZIP code | City | Distance | Type |
|---|---|---|---|
| 78664 | Round Rock, TX | 0.8 mi NE | Standard |
| 78665 | Round Rock, TX | 0.8 mi NE | Standard |
| 78717 | Austin, TX | 4.1 mi W | Standard |
| 78651 | Mc Neil, TX | 4.3 mi SW | PO Box only |
| 78764 | Austin, TX | 4.5 mi S | PO Box only |
| 78728 | Austin, TX | 4.6 mi S | Standard |
| 78660 | Pflugerville, TX | 5.4 mi SE | Standard |
| 78691 | Pflugerville, TX | 5.9 mi SE | PO Box only |
| 78727 | Austin, TX | 6.2 mi SW | Standard |
| 78729 | Austin, TX | 6.6 mi SW | Standard |
| 78634 | Hutto, TX | 6.8 mi E | Standard |
| 78613 | Cedar Park, TX | 8.4 mi W | Standard |
Straight-line distance between ZIP code center points. Find every ZIP code within 10 miles of 78681 or measure the distance to another ZIP code.
How to address mail to 78681
123 MAIN ST
ROUND ROCK TX 78681
Put the city, the two-letter state code and the ZIP code on the last line. USPS also accepts AUSTIN as the city name for 78681. Adding the 4-digit ZIP+4 code (78681-XXXX) helps mail sort faster but isn’t required.
Other ZIP codes in Round Rock, TX
All Round Rock ZIP codes with population and income →
Questions
- What city is ZIP code 78681?
- 78681 is a Round Rock, Texas ZIP code. Austin is also accepted as the city name.
- What county is 78681 in?
- ZIP code 78681 is in Williamson County, Texas.
- What time zone is ZIP code 78681 in?
- 78681 is in the Central Time zone (America/Chicago).
- What area code is 78681?
- Phone numbers in ZIP code 78681 use area codes 512 and 737.
- What is the population of ZIP code 78681?
- About 56,691 people live in ZIP code 78681, according to the Census Bureau’s American Community Survey (2020–2024).
- What is the median income in 78681?
- The median household income in 78681 is $137,819 a year, higher than 96% of Texas ZIP codes.
- What ZIP codes are near 78681?
- The nearest ZIP codes to 78681 are 78664 (Round Rock, 0.8 miles), 78665 (Round Rock, 0.8 miles), 78717 (Austin, 4.1 miles) and 78651 (Mc Neil, 4.3 miles).