Zip Code 78748 is located in South Austin and San Leanna near Interstate 35 and W Slaughter Lane. Search Texas homes for sale in the 78748 zip code area. Find information on the community and real estate services available to home buyers and sellers in the Austin, TX 78748 area. Browse homes for sale in 78748, a zip code in South Austin, Austin, Texas. For more info about any of these 78748 real estate listings, click the "Request More Information" button located on the detail page of each property.