McLennan County is in Central Texas, with Waco as its county seat. The county lies along the Interstate 35 corridor between the Dallas-Fort Worth and Austin areas.
McLennan 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 McLennan 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.
Where is McLennan County?
McLennan County is in Central Texas, with Waco as its county seat. The county lies along the Interstate 35 corridor between the Dallas-Fort Worth and Austin areas.
The county combines Waco’s built-up areas, smaller communities, and rural spaces. Maps and countywide averages are a starting point, not a substitute for neighborhood-level information.
McLennan County FIPS code explained
The official county FIPS code is 48309. The first two digits, 48, represent Texas. The final three digits, 309, identify McLennan County within Texas. Always keep all five digits, including leading zeros if present, when using government datasets or county lookup tools.
Population, income, housing, and land area
Population, household income, median home value, median age, and poverty figures in this profile use the American Community Survey (ACS) 2020–2024 5-year estimates. These are statistical estimates, not live counts or today’s real-estate prices. Household income and owner-occupied home values use the dollar basis of that ACS release.
The county polygon and land area are retrieved from the U.S. Census Bureau’s 2026 TIGERweb geographic service. Population density is calculated using the ACS population estimate divided by the Census boundary’s land area in square miles. Different reference years and statistical uncertainty can affect comparisons.
Compare McLennan County with other Texas counties
Williamson and Travis counties provide useful comparisons along the Central Texas corridor for population, income, housing, and density. You can open Williamson County and Travis County or choose any counties with the County Comparison Tool.
Frequently asked questions
What is the county seat of McLennan County?
The county seat is Waco. That is the county government’s administrative center. The county’s boundary includes additional communities beyond the county seat.
How can I verify McLennan County’s FIPS code?
Look up 48309 in our FIPS lookup tool or check the U.S. Census Bureau geographic reference information. The code refers to a county, not to a particular ZIP Code or city.
Can I use the map to decide a property line or legal boundary?
No. The map is intended for geographic orientation. Consult an official cadastral survey, local government, or relevant agency for legal property boundaries, tax jurisdictions, emergency services, or election districts.
Why does a number sometimes display as unavailable?
These charts depend on external Census-related services, so individual numbers or boundaries can occasionally be unavailable. Review the Data and Methodology page for the underlying release and limitations.
More useful tools
Return to the Texas county list and map, find counties from ZIP Codes, or use our current county finder.