Hays County stretches along the Interstate 35 corridor south of Austin. San Marcos, Kyle, and Buda form important parts of this Central Texas county.
Hays County facts
County estimates: American Community Survey (ACS) 2020–2024 5-year release. Boundary and land area: U.S. Census Bureau TIGERweb. Data may change as sources are updated.
Interactive Hays County map
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Map tiles © OpenStreetMap contributors. Map boundaries are not legal property lines. Scroll-wheel zoom is disabled to make page scrolling easier.
About Hays County
Hays County stretches along the Interstate 35 corridor south of Austin. San Marcos, Kyle, and Buda form important parts of this Central Texas county.
Its eastern corridor includes urban and suburban areas, while western parts transition into Texas Hill Country terrain. The county-wide population and income measures cover all those communities.
What is the Hays County FIPS code?
The five-digit county FIPS code for Hays County, Texas, is 48209. The first two digits, 48, identify Texas, while the last three digits, 209, identify Hays County within the state. The county code is distinct from a postal ZIP Code.
FIPS codes are used to connect records across county-level geographic datasets. Use all five digits when searching the Census Bureau’s data. City limits, county boundaries, school districts, and postal ZIP Codes can differ.
County population, income, housing, and land area
The figures above use the American Community Survey 2020-2024 five-year estimates for population, median household income, median owner-occupied home value, median age, and poverty. The survey’s estimates have margins of error. They are not live population counts or listings of current real-estate prices.
The map boundary and land area come from the U.S. Census Bureau’s TIGERweb 2026 county geography. Population density on this page divides the ACS population estimate by mapped land area in square miles. Data vintages and survey methods can affect the comparability of figures.
Compare Hays County with nearby areas
Explore Travis County and Williamson County, or use the County Comparison Tool. Comparisons provide broad context; they do not establish which location is better for every person.
Frequently asked questions
What is the county seat of Hays County?
San Marcos is the county seat. A county seat is an administrative center, not a synonym for the entire county.
How can I check an address in Hays County?
Use a local government GIS or authoritative address lookup for a precise address. The What County Am I In? tool provides general location assistance, but parcel and jurisdiction decisions require official records.
Are these boundaries appropriate for property or legal decisions?
No. This interactive map is for general county reference. It should not replace parcel surveys, election maps, zoning maps, or authoritative emergency-service jurisdictions.
What happens when a Census data service is unavailable?
The interactive facts or map can show an unavailable message. We do not substitute guessed population or financial values. Review the Data and Methodology page for definitions and data limitations.
Sources and more tools
Data sources: U.S. Census Bureau American Community Survey, TIGERweb county geography, and Texas county seats. See the Texas county directory, county FIPS lookup, and ZIP-to-county finder.