Home Metro areas Austin-Round Rock-San Marcos, TX Austin-Round Rock-San Marcos, TX metro area ZIP codes The Austin-Round Rock-San Marcos, TX metropolitan statistical area (CBSA 12420) covers 5 counties in Texas and 129 ZIP codes.
ZIP codes 129
Population 2,436,734
Avg. median income $106,700population-weighted
Counties 5 Click anywhere on the map to see which ZIP code it's in.
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Counties in the Austin-Round Rock-San Marcos, TX area ZIP codes in the Austin-Round Rock-San Marcos, TX area ZIP codes in the Austin-Round Rock-San Marcos, TX area ZIP code City County Population Median income Typical home value 73301 PO Box Austin Travis County — — — 73344 PO Box Austin Travis County — — — 76527 Florence Williamson County 4,918 $81,574 $529,800 76530 Granger Williamson County 2,598 $106,250 $310,700 76537 Jarrell Williamson County 16,272 $98,199 $250,900 76573 Schwertner Williamson County 0 — — 76574 Taylor Williamson County 20,242 $78,568 $276,800 76578 Thrall Williamson County 1,762 $105,063 $362,800 78602 Bastrop Bastrop County 38,190 $89,968 $347,400 78610 Buda Hays County 48,319 $119,698 $358,500 78612 Cedar Creek Bastrop County 19,799 $95,496 $412,600 78613 Cedar Park Williamson County 89,956 $125,487 $451,800 78615 Coupland Williamson County 1,637 $80,938 $528,500 78616 Dale Caldwell County 10,683 $64,715 $354,200 78617 Del Valle Travis County 30,756 $71,640 $277,700 78619 Driftwood Hays County 6,693 $183,393 $926,000 78620 Dripping Springs Hays County 22,860 $153,477 $671,500 78621 Elgin Bastrop County 30,411 $98,534 $285,100 78622 Fentress Caldwell County 331 — $227,200 78626 Georgetown Williamson County 48,072 $100,431 $343,600 78627 PO Box Georgetown Williamson County — — — 78628 Georgetown Williamson County 50,822 $125,635 $469,000 78630 PO Box Cedar Park Williamson County — — — 78633 Georgetown Williamson County 29,309 $100,936 $435,900 78634 Hutto Williamson County 46,413 $114,426 $328,000 78640 Kyle Hays County 77,531 $90,075 $293,500 78641 Leander Travis County 99,865 $135,024 $425,300 78642 Liberty Hill Williamson County 26,434 $132,958 $485,700 78644 Lockhart Caldwell County 22,348 $74,709 $277,600 78645 Leander Travis County 15,256 $113,008 $412,300 78646 PO Box Leander Williamson County — — — 78648 Luling Caldwell County 7,863 $57,621 $225,500 78650 Mc Dade Bastrop County 2,409 $85,170 $453,100 78651 PO Box Mc Neil Travis County — — — 78652 Manchaca Travis County 5,287 $133,368 $459,100 78653 Manor Travis County 41,291 $93,900 $309,700 78655 Martindale Caldwell County 3,730 $55,952 $329,500 78656 Maxwell Caldwell County 2,847 $81,346 $252,500 78659 Paige Bastrop County 2,660 $89,808 $439,600 78660 Pflugerville Travis County 124,834 $113,205 $364,300 78661 Prairie Lea Caldwell County 835 $82,896 $201,900 78662 Red Rock Bastrop County 3,015 $94,005 $443,500 78664 Round Rock Williamson County 62,060 $87,417 $327,600 78665 Round Rock Williamson County 66,171 $122,680 $390,300 78666 San Marcos Hays County 88,583 $54,737 $309,400 78667 PO Box San Marcos Hays County — — — 78669 Spicewood Travis County 12,592 $128,000 $691,400 78673 PO Box Walburg Williamson County — — — 78674 Weir Williamson County 108 — $47,500 78676 Wimberley Hays County 15,822 $87,344 $555,600 78680 PO Box Round Rock Williamson County — — — 78681 Round Rock Williamson County 56,691 $137,819 $473,200 78682 PO Box Round Rock Williamson County — — — 78683 PO Box Round Rock Williamson County — — — 78691 PO Box Pflugerville Travis County — — — 78701 Austin Travis County 11,824 $162,168 $650,700 78702 Austin Travis County 25,985 $102,171 $543,800 78703 Austin Travis County 23,483 $153,036 $1,298,200 78704 Austin Travis County 50,688 $106,897 $715,300 78705 Austin Travis County 33,238 $32,380 $319,800 78708 PO Box Austin Travis County — — — 78709 PO Box Austin Travis County — — — 78710 PO Box Austin Travis County — — — 78711 PO Box Austin Travis County — — — 78712 Austin Travis County 201 — — 78713 PO Box Austin Travis County — — — 78714 PO Box Austin Travis County — — — 78715 PO Box Austin Travis County — — — 78716 PO Box Austin Travis County — — — 78717 Austin Williamson County 37,262 $145,325 $548,400 78718 PO Box Austin Travis County — — — 78719 Austin Travis County 1,796 $56,202 $404,900 78720 PO Box Austin Travis County — — — 78721 Austin Travis County 10,997 $84,573 $406,100 78722 Austin Travis County 6,767 $105,046 $557,500 78723 Austin Travis County 38,129 $100,329 $466,800 78724 Austin Travis County 31,103 $77,926 $308,800 78725 Austin Travis County 10,746 $105,795 $261,000 78726 Austin Travis County 14,506 $90,885 $693,300 78727 Austin Travis County 29,958 $110,379 $442,800 78728 Austin Travis County 26,777 $75,243 $392,400 78729 Austin Williamson County 30,460 $86,438 $419,900 78730 Austin Travis County 9,142 $158,673 $1,099,600 78731 Austin Travis County 27,507 $105,494 $1,022,000 78732 Austin Travis County 21,087 $192,500 $806,200 78733 Austin Travis County 9,029 $206,368 $1,161,500 78734 Austin Travis County 22,145 $130,784 $603,800 78735 Austin Travis County 20,996 $139,191 $808,900 78736 Austin Travis County 9,651 $93,805 $581,100 78737 Austin Hays County 27,023 $168,920 $766,000 78738 Austin Travis County 31,019 $183,048 $839,900 78739 Austin Travis County 20,659 $238,559 $785,200 78741 Austin Travis County 45,951 $66,741 $316,400 78742 Austin Travis County 847 — — 78744 Austin Travis County 50,986 $83,002 $318,900 78745 Austin Travis County 61,219 $86,109 $405,400 78746 Austin Travis County 28,256 $188,414 $1,711,400 78747 Austin Travis County 22,180 $92,748 $345,800 78748 Austin Travis County 55,631 $115,213 $395,400 78749 Austin Travis County 34,562 $111,079 $544,600 78750 Austin Travis County 29,277 $121,563 $587,900 78751 Austin Travis County 16,961 $80,915 $576,900 78752 Austin Travis County 23,317 $67,682 $361,100 78753 Austin Travis County 56,920 $65,170 $327,500 78754 Austin Travis County 32,690 $90,121 $348,500 78755 PO Box Austin Travis County — — — 78756 Austin Travis County 9,197 $94,701 $691,600 78757 Austin Travis County 23,856 $103,860 $581,300 78758 Austin Travis County 49,617 $74,381 $356,400 78759 Austin Travis County 43,182 $102,400 $644,600 78760 PO Box Austin Travis County — — — 78761 PO Box Austin Travis County — — — 78762 PO Box Austin Travis County — — — 78763 PO Box Austin Travis County — — — 78764 PO Box Austin Travis County — — — 78765 PO Box Austin Travis County — — — 78766 PO Box Austin Travis County — — — 78767 PO Box Austin Travis County — — — 78768 PO Box Austin Travis County — — — 78769 PO Box Austin Travis County — — — 78772 PO Box Austin Travis County — — — 78773 PO Box Austin Travis County — — — 78774 PO Box Austin Travis County — — — 78778 PO Box Austin Travis County — — — 78779 PO Box Austin Travis County — — — 78783 PO Box Austin Travis County — — — 78799 PO Box Austin Travis County — — — 78953 Rosanky Bastrop County 1,089 $83,438 $535,800 78957 Smithville Bastrop County 10,543 $69,149 $334,800
Population and median household income: ACS 2020–2024 5-year estimates. Typical home value: Zillow Home Value Index (September 2026) where available, otherwise the ACS median owner-reported value. "PO Box" marks ZIP codes with no delivery area of their own. Methodology
Frequently asked questions How many ZIP codes are in the Austin-Round Rock-San Marcos, TX metro area? 129 ZIP codes, based on each ZIP code's main county.
Which counties make up the Austin-Round Rock-San Marcos, TX area? Bastrop County, Caldwell County, Hays County, Travis County and Williamson County.
What is an MSA? A metropolitan statistical area (MSA) is a core city of 50,000+ people plus the surrounding counties tied to it by commuting, as defined by the U.S. Office of Management and Budget. Micropolitan areas have a core of 10,000–50,000. Together they are called core-based statistical areas (CBSAs).