Round Rock ZIP codes, Texas
Round Rock, TX has 6 ZIP codes (78665, 78664, 78681, 78680, 78682 and 78683) and area codes 512 and 737. The largest is 78665.
- USPS city name
- 6 ZIP codes
- Overlapping the city
- 5 more
- Population
- 127,786
- County
- Williamson County
- State
- Texas
NANPA lists no telephone rate centre for Round Rock itself, so these are the area codes of the nearest one, Austin (4.2 miles). A town on an area-code boundary can differ from its neighbour.
Mail addressed to Round Rock uses the ZIP codes above. 5 more ZIP codes cover part of the city but are addressed as somewhere else; they are listed separately below.
Round Rock in numbers
About 127,786 people live in Round Rock, in 48,647 households, the 29th-largest of Texas's 1,789 census places. The median household income is $99,287 a year, 27% above the Texas median of $78,476 (US: $80,734). The median owner-occupied home is valued at $418,600 (47% above the Texas median), and median gross rent is $1,763 a month. The median age is 36.2; 44.8% of adults 25 and over hold a bachelor's degree or higher (33.8% across Texas); the average commute takes 25 minutes.
| Population | 127,786 |
|---|---|
| Households | 48,647 |
| Median age | 36.2 |
| Median household income | $99,287 |
| Median home value | $418,600 |
| Median gross rent | $1,763 |
| Bachelor's degree or higher | 44.8% |
| Mean commute | 24.9 min |
| Population density | 3,351 / sq mi |
U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates, for the census place Round Rock city. Survey estimates carry margins of error, wider for small places. Sources and methods.
ZIP codes addressed as Round Rock
| ZIP | City | Type | Population | Median income | Median home |
|---|---|---|---|---|---|
78665 | Round Rock , TX | Standard | 66,171 | $122,680 | $474,100 |
78664 | Round Rock , TX | Standard | 62,060 | $87,417 | $358,200 |
78681 | Round Rock , TX | Standard | 56,691 | $137,819 | $497,300 |
78680 | Round Rock , TX | No street area | — | — | — |
78682 | Round Rock , TX | No street area | — | — | — |
78683 | Round Rock , TX | No street area | — | — | — |
Other ZIP codes overlapping Round Rock
These ZIP codes cover part of Round Rock but are addressed as somewhere else.
| ZIP | City | Type | Population | Median income | Median home |
|---|---|---|---|---|---|
78626 | Georgetown , TX | Standard | 48,072 | $100,431 | $387,700 |
78628 | Georgetown , TX | Standard | 50,822 | $125,635 | $496,600 |
78634 | Hutto , TX | Standard | 46,413 | $114,426 | $375,200 |
78660 | Pflugerville , TX | Standard | 124,834 | $113,205 | $411,900 |
78728 | Austin , TX | Standard | 26,777 | $75,243 | $437,000 |
Map of Round Rock ZIP codes
The ZIP codes of Round Rock, TX, shaded. Outlines are Census ZIP Code Tabulation Areas (2020), which approximate the mail routes; PO-box and single-address codes have no area and are not drawn. Click any area to open its ZIP code.
Towns near Round Rock
The nearest larger towns are Austin (979,539 people, 17 mi), Killeen (158,159 people, 38 mi) and Waco (143,570 people, 77 mi).
| Town | Population | Distance |
|---|---|---|
| Brushy Creek | 19,576 | 4.6 mi |
| Wells Branch | 13,523 | 5.8 mi |
| Pflugerville | 65,971 | 6.5 mi |
| Hutto | 35,483 | 7.2 mi |
| Cedar Park | 78,301 | 9.3 mi |
| Georgetown | 85,999 | 10.0 mi |
| Leander | 74,067 | 12.3 mi |
| Manor | 18,603 | 13.4 mi |
| Santa Rita Ranch | 6,586 | 13.7 mi |
| Taylor | 17,136 | 14.2 mi |
| Jonestown | 2,535 | 16.3 mi |
| Austin | 979,539 | 16.6 mi |
| Liberty Hill | 8,371 | 17.2 mi |
| Hudson Bend | 4,127 | 17.5 mi |
More nearby: every ZIP code in Williamson County · Texas ZIP codes
Cite this page
zipcodes.pro. “Round Rock, TX ZIP codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/city/tx/round-rock
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