ROUND ROCK, TX ZIP Code
| City | ROUND ROCK |
| State | Texas |
| ZIP Codes count | 6 (see all) |
| Post offices count | 2 (see all) |
| Total population | 120,157 (see all) |
ZIP Codes in ROUND ROCK, Texas
The ZIP Codes in ROUND ROCK, Texas fall within the range from 78664 to 78683. ROUND ROCK is covered by 6 ZIP Codes: 3 Standard, 1 Unique and 2 PO Box. Below is the complete list:
78664, 78665, 78680, 78681, 78682, 78683
This list contains only 5-digit ZIP codes. Use our zip code lookup by address feature to get the full 9-digit (ZIP+4) code.
List of ROUND ROCK, TX ZIP Codes
| ZIP | TYPE | POPU |
|---|---|---|
| 78664 | STANDARD | 60,152 |
| 78665 | STANDARD | 59,935 |
| 78680 | PO BOX | – |
| 78681 | STANDARD | 57,451 |
| 78682 | UNIQUE | – |
| 78683 | PO BOX | – |
Post offices
ROUND ROCK — Post Office™ 2250 DOUBLE CREEK DR ROUND ROCK, TX 78664-9998 |
ROUND ROCK WEST — Post Office™ 797 SAM BASS RD ROUND ROCK, TX 78681-9998 |
Envelope example
On the bottom center of the envelope, write the address you want your letter delivered to. Include the following on separate lines:
- Recipient's full name
- Full street address
- City, State, and ZIP Code
Using the same format, write the return address in the top left corner.
Using the full ZIP+4 Code when mailing via the USPS ensures the fastest, most accurate mailing possible. If you are not sure of the full 9-digit ZIP Code, use the 5-digit ZIP Code to avoid loss of letter or package.

The recipient address information is provided for your reference.
Address example
3405 ARROWHEAD CIR
ROUND ROCK TX 78681-1756
ROUND ROCK TX 78681-1756
3179 CUTAWAY CV
ROUND ROCK TX 78681-3812
ROUND ROCK TX 78681-3812
1146 DYER CREEK PL
ROUND ROCK TX 78665-7901
ROUND ROCK TX 78665-7901
8476 IRONWEED RUN
ROUND ROCK TX 78681-3586
ROUND ROCK TX 78681-3586
8410 LAUGHING WATER LN
ROUND ROCK TX 78681-3598
ROUND ROCK TX 78681-3598
1085 LITTLE OAK WAY
ROUND ROCK TX 78681-5516
ROUND ROCK TX 78681-5516
Map
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Census data for ROUND ROCK, TX
Demographic and housing estimates in ROUND ROCK, TX
| Total population | 120,157 |
| Male | 59,514 |
| Female | 60,643 |
| Total population | 120,157 |
| Under 5 years | 7,403 |
| 5 to 9 years | 9,750 |
| 10 to 14 years | 9,900 |
| 15 to 19 years | 9,604 |
| 20 to 24 years | 7,883 |
| 25 to 34 years | 17,229 |
| 35 to 44 years | 20,556 |
| 45 to 54 years | 16,865 |
| 55 to 59 years | 5,683 |
| 60 to 64 years | 5,773 |
| 65 to 74 years | 6,555 |
| 75 to 84 years | 2,085 |
| 85 years and over | 871 |
| Median age (years) | 33.9 |
| Under 18 years | 33,214 |
| 16 years and over | 91,139 |
| 18 years and over | 86,943 |
| 21 years and over | 82,126 |
| 62 years and over | 12,536 |
| 65 years and over | 9,511 |
| Total population | 120,157 |
| One race | 114,763 |
| White | 90,209 |
| Black or African American | 12,204 |
| American Indian and Alaska Native | 260 |
| Asian | 8,103 |
| Native Hawaiian and Other Pacific Islander | 21 |
| Some other race | 3,966 |
| Two or more races | 5,394 |
| Citizen, VOTING AGE 18 and over population | 78,208 |
| Male Citizen, VOTING AGE 18 and over population | 37,996 |
| Female Citizen, VOTING AGE 18 and over population | 40,212 |
Social characteristics in ROUND ROCK, TX
| Total households | 37,830 |
| Family households (families) | 27,874 |
| Married-couple family | 21,398 |
| Male householder, no wife present, family | 2,006 |
| Female householder, no husband present, family | 4,470 |
| Nonfamily households | 9,956 |
| Average household size | 3.16 |
| Average family size | 3.67 |
Economic characteristics in ROUND ROCK, TX
| Total households | 37,830 |
| Less than $10,000 | 990 |
| $10,000 to $14,999 | 782 |
| $15,000 to $24,999 | 1,629 |
| $25,000 to $34,999 | 2,864 |
| $35,000 to $49,999 | 3,965 |
| $50,000 to $74,999 | 7,230 |
| $75,000 to $99,999 | 6,084 |
| $100,000 to $149,999 | 7,889 |
| $150,000 to $199,999 | 3,197 |
| $200,000 or more | 3,200 |
| Median household income (dollars) | 80,637 |
Housing characteristics in ROUND ROCK, TX
| Total housing units | 40,806 |
| Occupied housing units | 37,830 |
| Vacant housing units | 2,976 |
| Total housing units | 40,806 |
| 1-unit, detached | 27,746 |
| 1-unit, attached | 879 |
| 2 units | 1,203 |
| 3 or 4 units | 886 |
| 5 to 9 units | 1,858 |
| 10 to 19 units | 3,168 |
| 20 or more units | 4,961 |
| Mobile home | 105 |
| Boat, RV, van, etc. | 0 |
| Total housing units | 40,806 |
| Built 2014 or later | 2,725 |
| Built 2010 to 2013 | 1,831 |
| Built 2000 to 2009 | 14,228 |
| Built 1990 to 1999 | 10,112 |
| Built 1980 to 1989 | 6,835 |
| Built 1970 to 1979 | 3,923 |
| Built 1960 to 1969 | 451 |
| Built 1950 to 1959 | 323 |
| Built 1940 to 1949 | 223 |
| Built 1939 or earlier | 155 |
| Total housing units | 40,806 |
| 1 room | 455 |
| 2 rooms | 1,398 |
| 3 rooms | 3,728 |
| 4 rooms | 5,641 |
| 5 rooms | 6,785 |
| 6 rooms | 7,530 |
| 7 rooms | 4,893 |
| 8 rooms | 4,527 |
| 9 rooms or more | 5,849 |
| Median rooms | 5.8 |
| Total housing units | 40,806 |
| No bedroom | 545 |
| 1 bedroom | 4,917 |
| 2 bedrooms | 7,087 |
| 3 bedrooms | 15,233 |
| 4 bedrooms | 11,085 |
| 5 or more bedrooms | 1,939 |
| Occupied housing units | 37,830 |
| Owner-occupied | 23,229 |
| Renter-occupied | 14,601 |
| Average household size of owner-occupied unit | 3.31 |
| Average household size of renter-occupied unit | 2.92 |
| Occupied housing units | 37,830 |
| Moved in 2017 or later | 3,087 |
| Moved in 2015 to 2016 | 6,231 |
| Moved in 2010 to 2014 | 12,134 |
| Moved in 2000 to 2009 | 11,064 |
| Moved in 1990 to 1999 | 3,699 |
| Moved in 1989 and earlier | 1,615 |
| Owner-occupied units | 23,229 |
| Less than $50,000 | 395 |
| $50,000 to $99,999 | 272 |
| $100,000 to $149,999 | 3,266 |
| $150,000 to $199,999 | 4,744 |
| $200,000 to $299,999 | 7,951 |
| $300,000 to $499,999 | 5,804 |
| $500,000 to $999,999 | 709 |
| $1,000,000 or more | 88 |
| Median (dollars) | 230,100 |
| Owner-occupied units | 23,229 |
| Housing units with a mortgage | 18,130 |
| Housing units without a mortgage | 5,099 |
| Occupied units paying rent | 14,371 |
| Less than $500 | 193 |
| $500 to $999 | 2,858 |
| $1,000 to $1,499 | 7,409 |
| $1,500 to $1,999 | 3,241 |
| $2,000 to $2,499 | 345 |
| $2,500 to $2,999 | 165 |
| $3,000 or more | 160 |
| Median (dollars) | 1,238 |
| No rent paid | 230 |
Data is based on 2018 Census
ZIP Codes for other locations
State for ROUND ROCK
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