Every ZIP code in the United States, with weather, radar, trivia and the numbers behind it. Five digits since 1963!

ZIP stands for Zone Improvement Plan. The codes went live on July 1, 1963.The lowest ZIP code is 00501 — the IRS in Holtsville, New York.The highest ZIP code is 99950, in Ketchikan, Alaska.Type 07734 into a calculator and turn it upside down: hELLO. It is Keansburg, New Jersey.12345 belongs to one company: General Electric in Schenectady, New York.The first digit is a region: 0 is New England and New Jersey, 9 is the West Coast, Alaska and Hawaii.Mr. ZIP, the cartoon mailman, was the mascot that sold the idea to America.ZIP+4 arrived in 1983 and can narrow a ZIP down to one side of one block.A ZIP code is a mail route, not a place: plenty of them cross county and even state lines.Play ZIP Hunt: guess the secret ZIP code of the day in six tries.
zipcodes.pro — METRO/12420-AUSTIN-ROUND-ROCK-SAN-MARCOS

Austin-Round Rock-San Marcos, TX

ZIP codes
129
CBSA code
12420
Type
Metropolitan statistical area
States
TX
Population
2,426,592

Metro areas are defined by the Office of Management and Budget as whole counties, so every ZIP code in a member county is listed here.

Austin-Round Rock-San Marcos in numbers

About 2,426,592 people live in the Austin-Round Rock-San Marcos metropolitan area. The median household income is $100,431 a year (US: $80,734). The median owner-occupied home is valued at $465,000, and median gross rent is $1,726 a month.

Population2,426,592Austin-Round Rock-San Marcos2,426,592
Median household income$100,431Austin-Round Rock-San Marcos$100,431US $80,734
Median home value$465,000Austin-Round Rock-San Marcos$465,000US $332,700
Median gross rent$1,726Austin-Round Rock-San Marcos$1,726US $1,413

U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates. Survey estimates carry margins of error, wider for small places. Sources and methods.

Its 5 counties

Counties in Austin-Round Rock-San Marcos, TX
CountyZIP codesPopulationMedian income
Travis County, TX 80 1,330,015 $99,611
Williamson County, TX 26 672,688 $111,340
Hays County, TX 8 268,638 $89,097
Bastrop County, TX 8 106,582 $86,226
Caldwell County, TX 7 48,669 $69,758

ZIP codes in Austin-Round Rock-San Marcos

ZIP codes in Austin-Round Rock-San Marcos, TX
ZIP City Type Population Median income Median home
73301 Austin , TX No street area — — —
73344 Austin , TX No street area — — —
76527 Florence , TX Standard 4,918 $81,574 $345,400
76530 Granger , TX Standard 2,598 $106,250 $288,300
76537 Jarrell , TX Standard 16,272 $98,199 $290,900
76573 Schwertner , TX Standard 0 — —
76574 Taylor , TX Standard 20,242 $78,568 $297,500
76578 Thrall , TX Standard 1,762 $105,063 $341,300
78602 Bastrop , TX Standard 38,190 $89,968 $332,600
78610 Buda , TX Standard 48,319 $119,698 $408,000
78612 Cedar Creek , TX Standard 19,799 $95,496 $309,200
78613 Cedar Park , TX Standard 89,956 $125,487 $496,200
78615 Coupland , TX Standard 1,637 $80,938 $441,200
78616 Dale , TX Standard 10,683 $64,715 $211,500
78617 Del Valle , TX Standard 30,756 $71,640 $281,700
78619 Driftwood , TX Standard 6,693 $183,393 $810,600
78620 Dripping Springs , TX Standard 22,860 $153,477 $676,500
78621 Elgin , TX Standard 30,411 $98,534 $320,800
78622 Fentress , TX Standard 331 — $160,900
78626 Georgetown , TX Standard 48,072 $100,431 $387,700
78627 Georgetown , TX No street area — — —
78628 Georgetown , TX Standard 50,822 $125,635 $496,600
78630 Cedar Park , TX No street area — — —
78633 Georgetown , TX Standard 29,309 $100,936 $464,600
78634 Hutto , TX Standard 46,413 $114,426 $375,200
78640 Kyle , TX Standard 77,531 $90,075 $330,400
78641 Leander , TX Standard 99,865 $135,024 $480,400
78642 Liberty Hill , TX Standard 26,434 $132,958 $506,600
78644 Lockhart , TX Standard 22,348 $74,709 $279,800
78645 Leander , TX Standard 15,256 $113,008 $434,600
78646 Leander , TX No street area — — —
78648 Luling , TX Standard 7,863 $57,621 $217,500
78650 Mc Dade , TX Standard 2,409 $85,170 $300,300
78651 Mc Neil , TX No street area — — —
78652 Manchaca , TX Standard 5,287 $133,368 $528,100
78653 Manor , TX Standard 41,291 $93,900 $358,000
78655 Martindale , TX Standard 3,730 $55,952 $269,900
78656 Maxwell , TX Standard 2,847 $81,346 $238,100
78659 Paige , TX Standard 2,660 $89,808 $349,700
78660 Pflugerville , TX Standard 124,834 $113,205 $411,900
78661 Prairie Lea , TX Standard 835 $82,896 $209,700
78662 Red Rock , TX Standard 3,015 $94,005 $248,600
78664 Round Rock , TX Standard 62,060 $87,417 $358,200
78665 Round Rock , TX Standard 66,171 $122,680 $474,100
78666 San Marcos , TX Standard 88,583 $54,737 $306,700
78667 San Marcos , TX No street area — — —
78669 Spicewood , TX Standard 12,592 $128,000 $671,000
78673 Walburg , TX No street area — — —
78674 Weir , TX Standard 108 — $47,500
78676 Wimberley , TX Standard 15,822 $87,344 $511,600
78680 Round Rock , TX No street area — — —
78681 Round Rock , TX Standard 56,691 $137,819 $497,300
78682 Round Rock , TX No street area — — —
78683 Round Rock , TX No street area — — —
78691 Pflugerville , TX No street area — — —
78701 Austin , TX Standard 11,824 $162,168 $722,400
78702 Austin , TX Standard 25,985 $102,171 $686,800
78703 Austin , TX Standard 23,483 $153,036 $1,495,800
78704 Austin , TX Standard 50,688 $106,897 $916,100
78705 Austin , TX Standard 33,238 $32,380 $647,600
78708 Austin , TX No street area — — —
78709 Austin , TX No street area — — —
78710 Austin , TX No street area — — —
78711 Austin , TX No street area — — —
78712 Austin , TX Standard 201 — —
78713 Austin , TX No street area — — —
78714 Austin , TX No street area — — —
78715 Austin , TX No street area — — —
78716 Austin , TX No street area — — —
78717 Austin , TX Standard 37,262 $145,325 $652,200
78718 Austin , TX No street area — — —
78719 Austin , TX Standard 1,796 $56,202 $456,200
78720 Austin , TX No street area — — —
78721 Austin , TX Standard 10,997 $84,573 $523,000
78722 Austin , TX Standard 6,767 $105,046 $678,300
78723 Austin , TX Standard 38,129 $100,329 $562,300
78724 Austin , TX Standard 31,103 $77,926 $344,000
78725 Austin , TX Standard 10,746 $105,795 $330,600
78726 Austin , TX Standard 14,506 $90,885 $698,100
78727 Austin , TX Standard 29,958 $110,379 $540,400
78728 Austin , TX Standard 26,777 $75,243 $437,000
78729 Austin , TX Standard 30,460 $86,438 $476,200
78730 Austin , TX Standard 9,142 $158,673 $1,014,700
78731 Austin , TX Standard 27,507 $105,494 $903,200
78732 Austin , TX Standard 21,087 $192,500 $853,900
78733 Austin , TX Standard 9,029 $206,368 $1,008,600
78734 Austin , TX Standard 22,145 $130,784 $677,300
78735 Austin , TX Standard 20,996 $139,191 $867,500
78736 Austin , TX Standard 9,651 $93,805 $573,100
78737 Austin , TX Standard 27,023 $168,920 $765,000
78738 Austin , TX Standard 31,019 $183,048 $916,300
78739 Austin , TX Standard 20,659 $238,559 $808,600
78741 Austin , TX Standard 45,951 $66,741 $420,100
78742 Austin , TX Standard 847 — —
78744 Austin , TX Standard 50,986 $83,002 $357,500
78745 Austin , TX Standard 61,219 $86,109 $504,800
78746 Austin , TX Standard 28,256 $188,414 $1,494,300
78747 Austin , TX Standard 22,180 $92,748 $430,300
78748 Austin , TX Standard 55,631 $115,213 $465,100
78749 Austin , TX Standard 34,562 $111,079 $585,200
78750 Austin , TX Standard 29,277 $121,563 $601,800
78751 Austin , TX Standard 16,961 $80,915 $852,000
78752 Austin , TX Standard 23,317 $67,682 $422,000
78753 Austin , TX Standard 56,920 $65,170 $371,300
78754 Austin , TX Standard 32,690 $90,121 $349,400
78755 Austin , TX No street area — — —
78756 Austin , TX Standard 9,197 $94,701 $832,000
78757 Austin , TX Standard 23,856 $103,860 $655,900
78758 Austin , TX Standard 49,617 $74,381 $440,200
78759 Austin , TX Standard 43,182 $102,400 $674,000
78760 Austin , TX No street area — — —
78761 Austin , TX No street area — — —
78762 Austin , TX No street area — — —
78763 Austin , TX No street area — — —
78764 Austin , TX No street area — — —
78765 Austin , TX No street area — — —
78766 Austin , TX No street area — — —
78767 Austin , TX No street area — — —
78768 Austin , TX No street area — — —
78769 Austin , TX No street area — — —
78772 Austin , TX No street area — — —
78773 Austin , TX No street area — — —
78774 Austin , TX No street area — — —
78778 Austin , TX No street area — — —
78779 Austin , TX No street area — — —
78783 Austin , TX No street area — — —
78799 Austin , TX No street area — — —
78953 Rosanky , TX Standard 1,089 $83,438 $325,400
78957 Smithville , TX Standard 10,543 $69,149 $259,900

Cite this page

zipcodes.pro. “Austin-Round Rock-San Marcos, TX.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/metro/12420-austin-round-rock-san-marcos

Underlying data is public domain or openly licensed — sources, vintages and licences.